{
  "updated": "2026-04-20",
  "source": {
    "name": "Wikipedia: Selected changes to the list of S&P 500 components",
    "url": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components",
    "note": "基于维基百科汇总的标普 500 成分变更记录,原始依据为 S&P Dow Jones Indices 官方新闻稿。"
  },
  "changes": [
    {
      "effectiveDate": "2026-04-09",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CASY",
        "name": "Casey's",
        "sector": "Consumer Staples"
      },
      "removal": {
        "ticker": "HOLX",
        "name": "Hologic",
        "sector": "Health Care"
      },
      "reason": "Blackstone 与 TPG 联合收购 Hologic，Casey's 由标普 MidCap 400 调入顶替。",
      "reasonEn": "Blackstone Inc. and TPG Inc. acquired Hologic.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2026-03-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "VRT",
        "name": "Vertiv",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "MTCH",
        "name": "Match Group",
        "sector": "Communication Services"
      },
      "reason": "季度再平衡:Vertiv 调入,Match Group 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2026-03-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "LITE",
        "name": "Lumentum",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "MOH",
        "name": "Molina Healthcare",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:Lumentum 调入,Molina Healthcare 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2026-03-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "COHR",
        "name": "Coherent Corp.",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "LW",
        "name": "Lamb Weston",
        "sector": "Consumer Staples"
      },
      "reason": "季度再平衡:Coherent Corp. 调入,Lamb Weston 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2026-03-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "SATS",
        "name": "EchoStar",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "PAYC",
        "name": "Paycom",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:EchoStar 调入,Paycom 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2026-02-09",
      "type": "并购触发",
      "addition": {
        "ticker": "CIEN",
        "name": "Ciena",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "DAY",
        "name": "Dayforce",
        "sector": "Industrials"
      },
      "reason": "Thoma Bravo 收购 Dayforce；原 S&P MidCap 400 成分股 Ciena 调入 S&P 500。",
      "sourceUrl": "https://press.spglobal.com/2026-02-04-Ciena-Set-to-Join-S-P-500-and-S-P-MidCap-400-Changes-Effective-February-10,-2026",
      "typeEn": "M&A trigger",
      "reasonEn": "Thoma Bravo acquired Dayforce; Ciena (formerly in the S&P MidCap 400) was added to the S&P 500."
    },
    {
      "effectiveDate": "2025-12-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "CRH",
        "name": "CRH",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "LKQ",
        "name": "LKQ Corporation",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:CRH 调入,LKQ Corporation 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-12-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "CVNA",
        "name": "Carvana",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "SOLS",
        "name": "Solstice Advanced Materials",
        "sector": "Materials"
      },
      "reason": "季度再平衡:Carvana 调入,Solstice Advanced Materials 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-12-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "FIX",
        "name": "Comfort Systems USA",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "MHK",
        "name": "Mohawk Industries",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Comfort Systems USA 调入,Mohawk Industries 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-12-11",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ARES",
        "name": "Ares Management",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "K",
        "name": "Kellanova",
        "sector": "Consumer Staples"
      },
      "reason": "Mars 收购 Kellanova，Ares Management 调入 S&P 500 顶替。",
      "reasonEn": "Mars Inc. acquired Kellanova.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-11-28",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "SNDK",
        "name": "Sandisk",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "IPG",
        "name": "Interpublic Group",
        "sector": "Communication Services"
      },
      "reason": "S&P 500 成分股 Omnicom Group 收购 Interpublic Group，SanDisk 调入顶替。",
      "reasonEn": "S&P 500 constituent Omnicom Group Inc. acquired (The) Interpublic Group.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-11-04",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "EMN",
        "name": "Eastman Chemical Co.",
        "sector": "Materials"
      },
      "reason": "季度再平衡: 调入,Eastman Chemical Co. 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-11-03",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "Q",
        "name": "Qnity Electronics",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Qnity Electronics 调入 S&P 500。",
      "reasonEn": "S&P 500 constituent Dupont de Nemours, Inc. spun off Qnity Electronics.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-10-31",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "KMX",
        "name": "CarMax",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡: 调入,CarMax 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-10-30",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "SOLS",
        "name": "Solstice Advanced Materials",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Solstice Advanced Materials 调入 S&P 500。",
      "reasonEn": "S&P 500 and S&P 100 constituent Honeywell International Inc. spun off Solstice Advanced Materials.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-09-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "EME",
        "name": "Emcor",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "ENPH",
        "name": "Enphase Energy",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:Emcor 调入,Enphase Energy 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-09-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "HOOD",
        "name": "Robinhood Markets",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "CZR",
        "name": "Caesars Entertainment",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Robinhood Markets 调入,Caesars Entertainment 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-09-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "APP",
        "name": "AppLovin",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "MKTX",
        "name": "MarketAxess",
        "sector": "Financials"
      },
      "reason": "季度再平衡:AppLovin 调入,MarketAxess 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-08-28",
      "type": "并购触发",
      "addition": {
        "ticker": "IBKR",
        "name": "Interactive Brokers Group",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "WBA",
        "name": "Walgreens Boots Alliance",
        "sector": "Consumer Staples"
      },
      "reason": "Sycamore Partners 收购 Walgreens Boots Alliance，Interactive Brokers Group 由 S&P MidCap 400 调入。",
      "sourceUrl": "https://press.spglobal.com/2025-08-25-Interactive-Brokers-Group-Set-to-Join-S-P-500,-Talen-Energy-to-Join-S-P-MidCap-400-and-Kinetik-Holdings-to-Join-S-P-SmallCap-600",
      "typeEn": "M&A trigger",
      "reasonEn": "Sycamore Partners acquired Walgreens Boots Alliance; Interactive Brokers Group was promoted from the S&P MidCap 400."
    },
    {
      "effectiveDate": "2025-07-23",
      "type": "并购触发",
      "addition": {
        "ticker": "XYZ",
        "name": "Block",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "HES",
        "name": "Hess",
        "sector": "Energy"
      },
      "reason": "Chevron 完成对 Hess 的收购，Block 被调入 S&P 500。",
      "sourceUrl": "https://press.spglobal.com/2025-07-18-Block-Set-to-Join-S-P-500",
      "typeEn": "M&A trigger",
      "reasonEn": "Chevron completed its acquisition of Hess; Block was added to the S&P 500."
    },
    {
      "effectiveDate": "2025-07-18",
      "type": "并购触发",
      "addition": {
        "ticker": "TTD",
        "name": "The Trade Desk",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "ANSS",
        "name": "ANSYS",
        "sector": "Information Technology"
      },
      "reason": "Synopsys 收购 ANSYS，The Trade Desk 被调入 S&P 500。",
      "sourceUrl": "https://press.spglobal.com/2025-07-14-The-Trade-Desk-Set-to-Join-S-P-500",
      "typeEn": "M&A trigger",
      "reasonEn": "Synopsys acquired ANSYS; The Trade Desk was added to the S&P 500."
    },
    {
      "effectiveDate": "2025-07-09",
      "type": "并购触发",
      "addition": {
        "ticker": "DDOG",
        "name": "Datadog",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "JNPR",
        "name": "Juniper Networks",
        "sector": "Information Technology"
      },
      "reason": "Hewlett Packard Enterprise 收购 Juniper Networks，Datadog 调入 S&P 500。",
      "sourceUrl": "https://press.spglobal.com/2025-07-02-Datadog-Set-to-Join-S-P-500",
      "typeEn": "M&A trigger",
      "reasonEn": "Hewlett Packard Enterprise acquired Juniper Networks; Datadog was added to the S&P 500."
    },
    {
      "effectiveDate": "2025-05-19",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "COIN",
        "name": "Coinbase",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "DFS",
        "name": "Discover Financial",
        "sector": "Financials"
      },
      "reason": "S&P 500 成分股 Capital One Financial 收购 Discover Financial Services，Coinbase 调入顶替。",
      "reasonEn": "S&P 500 constituent Capital One Financial Corp. acquired Discover Financial Services.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-03-24",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "DASH",
        "name": "DoorDash",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "BWA",
        "name": "BorgWarner",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:DoorDash 调入,BorgWarner 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-03-24",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "TKO",
        "name": "TKO Group Holdings",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "TFX",
        "name": "Teleflex",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:TKO Group Holdings 调入,Teleflex 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-03-24",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "WSM",
        "name": "Williams-Sonoma, Inc.",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "CE",
        "name": "Celanese",
        "sector": "Materials"
      },
      "reason": "季度再平衡:Williams-Sonoma, Inc. 调入,Celanese 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2025-03-24",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "EXE",
        "name": "Expand Energy",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "FMC",
        "name": "FMC Corporation",
        "sector": "Materials"
      },
      "reason": "季度再平衡:Expand Energy 调入,FMC Corporation 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-12-23",
      "type": "季度再平衡",
      "addition": {
        "ticker": "APO",
        "name": "Apollo Global Management",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "QRVO",
        "name": "Qorvo",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡中，Apollo 被认为更能代表大盘股空间，取代 Qorvo。",
      "sourceUrl": "https://press.spglobal.com/2024-12-06-Apollo-Global-Management-and-Workday-Set-to-Join-S-P-500-Others-to-Join-S-P-MidCap-400-and-S-P-SmallCap-600",
      "typeEn": "Quarterly rebalance",
      "reasonEn": "At quarterly rebalance, Apollo was deemed more representative of the large-cap universe and replaced Qorvo."
    },
    {
      "effectiveDate": "2024-12-23",
      "type": "季度再平衡",
      "addition": {
        "ticker": "WDAY",
        "name": "Workday",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "AMTM",
        "name": "Amentum Holdings",
        "sector": "Industrials"
      },
      "reason": "季度再平衡中，Workday 被认为更能代表大盘股空间，取代 Amentum Holdings。",
      "sourceUrl": "https://press.spglobal.com/2024-12-06-Apollo-Global-Management-and-Workday-Set-to-Join-S-P-500-Others-to-Join-S-P-MidCap-400-and-S-P-SmallCap-600",
      "typeEn": "Quarterly rebalance",
      "reasonEn": "At quarterly rebalance, Workday was deemed more representative of the large-cap universe and replaced Amentum Holdings."
    },
    {
      "effectiveDate": "2024-12-23",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "LII",
        "name": "Lennox International",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "CTLT",
        "name": "Catalent",
        "sector": "Health Care"
      },
      "reason": "Novo Holdings A/S 收购 Catalent，Lennox International 调入 S&P 500 顶替。",
      "reasonEn": "Novo Holdings A/S acquired Catalent.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-11-26",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "TPL",
        "name": "Texas Pacific Land Corporation",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "MRO",
        "name": "Marathon Oil",
        "sector": "Energy"
      },
      "reason": "S&P 500/100 成分股 ConocoPhillips 收购 Marathon Oil，Texas Pacific Land 调入顶替。",
      "reasonEn": "S&P 500 & 100 constituent Conoco Phillips acquired Marathon Oil.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-10-01",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "BBWI",
        "name": "Bath & Body Works, Inc.",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡: 调入,Bath & Body Works, Inc. 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-09-30",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "AMTM",
        "name": "Amentum",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Amentum 调入 S&P 500。",
      "reasonEn": "S&P 500 constituent Jacobs Solutionsspun off its Critical Mission Solutions and Cyber Intelligence business, which merged with private Amentum to create newly publicly traded Amentum Holdings.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-09-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "PLTR",
        "name": "Palantir Technologies",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "AAL",
        "name": "American Airlines Group",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:Palantir Technologies 调入,American Airlines Group 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-09-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "DELL",
        "name": "Dell Technologies",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "ETSY",
        "name": "Etsy",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Dell Technologies 调入,Etsy 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-09-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ERIE",
        "name": "Erie Indemnity",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "BIO",
        "name": "Bio-Rad Laboratories",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:Erie Indemnity 调入,Bio-Rad Laboratories 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-06-24",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "KKR",
        "name": "KKR",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "RHI",
        "name": "Robert Half",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:KKR 调入,Robert Half 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-06-24",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "CRWD",
        "name": "CrowdStrike",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "CMA",
        "name": "Comerica",
        "sector": "Financials"
      },
      "reason": "季度再平衡:CrowdStrike 调入,Comerica 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-06-24",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "GDDY",
        "name": "GoDaddy",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "ILMN",
        "name": "Illumina, Inc.",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:GoDaddy 调入,Illumina, Inc. 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-05-08",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "VST",
        "name": "Vistra",
        "sector": "Utilities"
      },
      "removal": {
        "ticker": "PXD",
        "name": "Pioneer Natural Resources",
        "sector": "Energy"
      },
      "reason": "S&P 500/100 成分股 Exxon Mobil 收购 Pioneer Natural Resources，Vistra 调入顶替。",
      "reasonEn": "S&P 500 and S&P 100 constituent Exxon Mobil acquired Pioneer Natural Resources.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-04-03",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "XRAY",
        "name": "Dentsply Sirona",
        "sector": "Health Care"
      },
      "reason": "季度再平衡: 调入,Dentsply Sirona 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-04-03",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "VFC",
        "name": "VF Corporation",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡: 调入,VF Corporation 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-04-02",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "GEV",
        "name": "GE Vernova",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,GE Vernova 调入 S&P 500。",
      "reasonEn": "S&P 500 and 100 constituent General Electric Corp. spun off GE Vernova.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-04-01",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "SOLV",
        "name": "Solventum",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Solventum 调入 S&P 500。",
      "reasonEn": "S&P 500 and 100 constituent 3 M Co. spun off Solventum.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-03-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "SMCI",
        "name": "Supermicro",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "WHR",
        "name": "Whirlpool Corporation",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Supermicro 调入,Whirlpool Corporation 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2024-03-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "DECK",
        "name": "Deckers Brands",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "ZION",
        "name": "Zions Bancorporation",
        "sector": "Financials"
      },
      "reason": "季度再平衡:Deckers Brands 调入,Zions Bancorporation 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-12-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "UBER",
        "name": "Uber",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "SEE",
        "name": "Sealed Air",
        "sector": "Materials"
      },
      "reason": "季度再平衡:Uber 调入,Sealed Air 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-12-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "JBL",
        "name": "Jabil",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "ALK",
        "name": "Alaska Air Group",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:Jabil 调入,Alaska Air Group 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-12-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "BLDR",
        "name": "Builders FirstSource",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "SEDG",
        "name": "SolarEdge",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:Builders FirstSource 调入,SolarEdge 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-10-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "HUBB",
        "name": "Hubbell",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "OGN",
        "name": "Organon & Co.",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:Hubbell 调入,Organon & Co. 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-10-18",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "LULU",
        "name": "Lululemon Athletica",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "ATVI",
        "name": "Activision Blizzard",
        "sector": "Communication Services"
      },
      "reason": "S&P 500/100 成分股 Microsoft 收购 Activision Blizzard，Lululemon 调入顶替。",
      "reasonEn": "S&P 500 and S&P 100 constituent Microsoft acquired Activision Blizzard.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-10-03",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "DXC",
        "name": "DXC Technology",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡: 调入,DXC Technology 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-10-02",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "VLTO",
        "name": "Veralto",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Veralto 调入 S&P 500。",
      "reasonEn": "S&P 500 and S&P 100 constituent Danaher Corporation spun off Veralto.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-09-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "BX",
        "name": "Blackstone",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "LNC",
        "name": "Lincoln National Corporation",
        "sector": "Financials"
      },
      "reason": "季度再平衡:Blackstone 调入,Lincoln National Corporation 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-09-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ABNB",
        "name": "Airbnb",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "NWL",
        "name": "Newell Brands",
        "sector": "Consumer Staples"
      },
      "reason": "季度再平衡:Airbnb 调入,Newell Brands 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-08-25",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "KVUE",
        "name": "Kenvue",
        "sector": "Consumer Staples"
      },
      "removal": {
        "ticker": "AAP",
        "name": "Advance Auto Parts",
        "sector": "Consumer Discretionary"
      },
      "reason": "S&P 500/100 成分股 Johnson & Johnson 以换股分拆方式剥离 Kenvue，Kenvue 独立上市后调入 S&P 500 顶替 Advance Auto Parts。",
      "reasonEn": "S&P 500 and S&P 100 constituent Johnson & Johnson offered to exchange the shares of Kenvue held for shares of Johnson & Johnson in a split-off exchange offer.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-06-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "PANW",
        "name": "Palo Alto Networks",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "DISH",
        "name": "Dish Network",
        "sector": "Communication Services"
      },
      "reason": "季度再平衡:Palo Alto Networks 调入,Dish Network 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-05-04",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "AXON",
        "name": "Axon Enterprise",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "FRC",
        "name": "First Republic Bank",
        "sector": "Financials"
      },
      "reason": "First Republic Bank 被 FDIC 接管，Axon Enterprise 调入 S&P 500 顶替。",
      "reasonEn": "The Federal Deposit Insurance Corporation(FDIC) placed First Republic Bank into FDIC Receivership.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-03-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "FICO",
        "name": "Fair Isaac",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "LUMN",
        "name": "Lumen Technologies",
        "sector": "Communication Services"
      },
      "reason": "季度再平衡:Fair Isaac 调入,Lumen Technologies 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-03-15",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "BG",
        "name": "Bunge Global",
        "sector": "Consumer Staples"
      },
      "removal": {
        "ticker": "SBNY",
        "name": "Signature Bank",
        "sector": "Financials"
      },
      "reason": "FDIC 接管 Signature Bank，Bunge 调入 S&P 500 顶替。",
      "reasonEn": "The FDIC placed Signature Bank into FDIC Receivership.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-03-15",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "PODD",
        "name": "Insulet",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "SIVB",
        "name": "SVB Financial Group",
        "sector": "Financials"
      },
      "reason": "FDIC 接管 SVB 核心子公司硅谷银行，Insulet 调入 S&P 500 顶替。",
      "reasonEn": "The FDIC placed SVB's main subsidiary,Silicon Valley Bank, into receivership.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-01-05",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "VNO",
        "name": "Vornado Realty Trust",
        "sector": "Real Estate"
      },
      "reason": "季度再平衡: 调入,Vornado Realty Trust 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2023-01-04",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "GEHC",
        "name": "GE HealthCare",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,GE HealthCare 调入 S&P 500。",
      "reasonEn": "S&P 500 constituent General Electric spun off GE Health Care.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-12-22",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "STLD",
        "name": "Steel Dynamics",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "ABMD",
        "name": "Abiomed",
        "sector": "Health Care"
      },
      "reason": "S&P 500 成分股 Johnson & Johnson 收购 Abiomed，Steel Dynamics 调入顶替。",
      "reasonEn": "S&P 500 constituent Johnson & Johnson acquired Abiomed.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-12-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "FSLR",
        "name": "First Solar",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "FBHS",
        "name": "Fortune Brands Home & Security",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:First Solar 调入,Fortune Brands Home & Security 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-12-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "MBC",
        "name": "MasterBrand",
        "sector": "Industrials"
      },
      "reason": "季度再平衡: 调入,MasterBrand 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-12-15",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "MBC",
        "name": "MasterBrand",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,MasterBrand 调入 S&P 500。",
      "reasonEn": "S&P 500 constituent Fortune Brands Home & Security spun off Master Brand.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-11-01",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ACGL",
        "name": "Arch Capital Group",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "TWTR",
        "name": "Twitter",
        "sector": "Communication Services"
      },
      "reason": "Elon Musk 完成对 Twitter 的私有化收购，Arch Capital 调入 S&P 500 顶替。",
      "reasonEn": "Elon Musk acquired Twitter.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-10-12",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "TRGP",
        "name": "Targa Resources",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "NLSN",
        "name": "Nielsen Holdings",
        "sector": "Industrials"
      },
      "reason": "Elliott Management 收购 Nielsen Holdings，Targa Resources 调入 S&P 500 顶替。",
      "reasonEn": "Elliot Management Corp acquired Nielsen Holdings.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-10-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "PCG",
        "name": "PG&E",
        "sector": "Utilities"
      },
      "removal": {
        "ticker": "CTXS",
        "name": "Citrix Systems",
        "sector": "Information Technology"
      },
      "reason": "Vista Equity Partners 收购 Citrix Systems，PG&E 调入 S&P 500 顶替。",
      "reasonEn": "Vista Equity Partners acquired Citrix Systems.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-10-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "EQT",
        "name": "EQT Corporation",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "DRE",
        "name": "Duke Realty",
        "sector": "Real Estate"
      },
      "reason": "S&P 500 成分股 Prologis 收购 Duke Realty，EQT Corp 调入顶替。",
      "reasonEn": "S&P 500 constituent Prologis Inc. acquired Duke Realty.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-09-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "CSGP",
        "name": "CoStar Group",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "PVH",
        "name": "PVH",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:CoStar Group 调入,PVH 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-09-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "INVH",
        "name": "Invitation Homes",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "PENN",
        "name": "Penn Entertainment",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Invitation Homes 调入,Penn Entertainment 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-06-21",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "UA",
        "name": "Under Armour(Class C)",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡: 调入,Under Armour(Class C) 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-06-21",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "KDP",
        "name": "Keurig Dr Pepper",
        "sector": "Consumer Staples"
      },
      "removal": {
        "ticker": "UAA",
        "name": "Under Armour(Class A)",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Keurig Dr Pepper 调入,Under Armour(Class A) 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-06-21",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ON",
        "name": "ON Semiconductor",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "IPGP",
        "name": "IPG Photonics",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:ON Semiconductor 调入,IPG Photonics 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-06-08",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "VICI",
        "name": "Vici Properties",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "CERN",
        "name": "Cerner",
        "sector": "Health Care"
      },
      "reason": "S&P 500 成分股 Oracle 收购 Cerner，VICI Properties 调入顶替。",
      "reasonEn": "S&P 500 constituent Oracle Corp. acquired Cerner.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-04-11",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "WBD",
        "name": "Warner Bros. Discovery",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "DISCA",
        "name": "Discovery, Inc.",
        "sector": "Communication Services"
      },
      "reason": "Warner Media 与 Discovery 合并成立 Warner Bros. Discovery，WBD 接替 DISCA。",
      "reasonEn": "Warner Media and Discovery merge to create Warner Bros. Discovery.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-04-11",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "DISCK",
        "name": "Discovery, Inc.",
        "sector": "Communication Services"
      },
      "reason": "Warner Media 与 Discovery 合并成立 Warner Bros. Discovery，DISCK C 类股同时被调出。",
      "reasonEn": "Warner Media and Discovery merge to create Warner Bros. Discovery.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-04-04",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CPT",
        "name": "Camden Property Trust",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "PBCT",
        "name": "People's United Financial",
        "sector": "Financials"
      },
      "reason": "S&P 500 成分股 M&T Bank 收购 People's United Financial，Camden Property Trust 调入顶替。",
      "reasonEn": "S&P 500 constituent M&T Bank Corp. acquired People's United Financial.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-03-02",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "MOH",
        "name": "Molina Healthcare",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "INFO",
        "name": "IHS Markit",
        "sector": "Industrials"
      },
      "reason": "S&P 500 成分股 S&P Global 收购 IHS Markit，Molina Healthcare 调入顶替。",
      "reasonEn": "S&P 500 constituent S&P Global Inc. acquired IHS Markit.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-02-15",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "NDSN",
        "name": "Nordson Corporation",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "XLNX",
        "name": "Xilinx",
        "sector": "Information Technology"
      },
      "reason": "S&P 500 成分股 AMD 收购 Xilinx，Nordson 调入顶替。",
      "reasonEn": "S&P 500 constituent Advanced Micro Devices acquired Xilinx.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-02-03",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "GPS",
        "name": "Gap",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡: 调入,Gap 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2022-02-02",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "CEG",
        "name": "Constellation Energy",
        "sector": "Utilities"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Constellation Energy 调入 S&P 500。",
      "reasonEn": "S&P 500 and 100 constituent Exelon Corp. spun off Constellation Energy.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-12-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "SBNY",
        "name": "Signature Bank",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "LEG",
        "name": "Leggett & Platt",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Signature Bank 调入,Leggett & Platt 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-12-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "SEDG",
        "name": "SolarEdge",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "HBI",
        "name": "Hanesbrands",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:SolarEdge 调入,Hanesbrands 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-12-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "FDS",
        "name": "FactSet",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "WU",
        "name": "Western Union",
        "sector": "Financials"
      },
      "reason": "季度再平衡:FactSet 调入,Western Union 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-12-14",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "EPAM",
        "name": "EPAM Systems",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "KSU",
        "name": "Kansas City Southern",
        "sector": "Industrials"
      },
      "reason": "Canadian Pacific 收购 Kansas City Southern，EPAM Systems 调入 S&P 500 顶替。",
      "reasonEn": "Canadian Pacific acquired Kansas City Southern.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-09-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "MTCH",
        "name": "Match Group",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "PRGO",
        "name": "Perrigo",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:Match Group 调入,Perrigo 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-09-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "CDAY",
        "name": "Ceridian",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "UNM",
        "name": "Unum",
        "sector": "Financials"
      },
      "reason": "季度再平衡:Ceridian 调入,Unum 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-09-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "BRO",
        "name": "Brown & Brown",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "NOV",
        "name": "Nov",
        "sector": "Energy"
      },
      "reason": "季度再平衡:Brown & Brown 调入,Nov 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-08-30",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "TECH",
        "name": "Bio-Techne",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "MXIM",
        "name": "Maxim Integrated",
        "sector": "Information Technology"
      },
      "reason": "S&P 500 成分股 Analog Devices 收购 Maxim Integrated，Bio-Techne 调入顶替。",
      "reasonEn": "S&P 500 constituent Analog Devices acquired Maxim Integrated Products.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-07-21",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "MRNA",
        "name": "Moderna",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "ALXN",
        "name": "Alexion Pharmaceuticals",
        "sector": "Health Care"
      },
      "reason": "AstraZeneca 收购 Alexion Pharmaceuticals，Moderna 调入 S&P 500 顶替。",
      "reasonEn": "Astra Zeneca acquired Alexion Pharmaceuticals.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-06-04",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "HFC",
        "name": "HollyFrontier",
        "sector": "Energy"
      },
      "reason": "季度再平衡: 调入,HollyFrontier 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-06-03",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "OGN",
        "name": "Organon & Co.",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Organon & Co. 调入 S&P 500。",
      "reasonEn": "S&P 500/100 constituent Merck & Co. spun off Organon.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-05-14",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CRL",
        "name": "Charles River Laboratories",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "FLIR",
        "name": "FLIR Systems",
        "sector": "Information Technology"
      },
      "reason": "S&P 500 成分股 Teledyne Technologies 收购 FLIR Systems，Charles River Labs 调入顶替。",
      "reasonEn": "S&P 500 constituent Teledyne Technologies acquired FLIR Systems.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-04-20",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "PTC",
        "name": "PTC",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "VAR",
        "name": "Varian Medical Systems",
        "sector": "Health Care"
      },
      "reason": "Siemens Healthineers 收购 Varian Medical Systems，PTC 调入 S&P 500 顶替。",
      "reasonEn": "Siemens Healthineers acquired Varian Medical Systems.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-03-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "NXPI",
        "name": "NXP",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "FLS",
        "name": "Flowserve",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:NXP 调入,Flowserve 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-03-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "PENN",
        "name": "Penn National Gaming",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "SLG",
        "name": "SL Green Realty",
        "sector": "Real Estate"
      },
      "reason": "季度再平衡:Penn National Gaming 调入,SL Green Realty 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-03-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "GNRC",
        "name": "Generac Holdings",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "XRX",
        "name": "Xerox",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:Generac Holdings 调入,Xerox 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-03-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "CZR",
        "name": "Caesars Entertainment",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "VNT",
        "name": "Vontier",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:Caesars Entertainment 调入,Vontier 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-02-12",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "MPWR",
        "name": "Monolithic Power Systems",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "FTI",
        "name": "TechnipFMC",
        "sector": "Energy"
      },
      "reason": "TechnipFMC 因分拆被调出,Monolithic Power Systems 调入 S&P 500。",
      "reasonEn": "Technip FMC was removed from the S&P 500 in anticipation of its announced spin-off of Technip Energies.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-01-21",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "TRMB",
        "name": "Trimble",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "CXO",
        "name": "Concho Resources",
        "sector": "Energy"
      },
      "reason": "S&P 500/100 成分股 ConocoPhillips 收购 Concho Resources，Trimble 调入顶替。",
      "reasonEn": "S&P 500/100 constituent Conoco Phillips acquired Concho Resources.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2021-01-07",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ENPH",
        "name": "Enphase Energy",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "TIF",
        "name": "Tiffany & Co",
        "sector": "Consumer Discretionary"
      },
      "reason": "LVMH 完成收购 Tiffany & Co.，Enphase Energy 调入 S&P 500 顶替。",
      "reasonEn": "LVMHMoet Hennessy-Louis Vuitton SE acquired Tiffany & Co.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-12-21",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "TSLA",
        "name": "Tesla",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "AIV",
        "name": "Apartment Investment & Management",
        "sector": "Real Estate"
      },
      "reason": "Apartment Investment & Management 因分拆被调出,Tesla 调入 S&P 500。",
      "reasonEn": "Apartment Investment and Management (Aimco) spun off Apartment Income REIT.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-10-12",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "NBL",
        "name": "Noble Energy",
        "sector": "Energy"
      },
      "reason": "Chevron 收购 Noble Energy，Noble 被调出(无同日直接替代)。",
      "reasonEn": "Chevron acquired Noble Energy.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-10-09",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "VNT",
        "name": "Vontier",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": " 因分拆被调出,Vontier 调入 S&P 500。",
      "reasonEn": "S&P 500 constituent Fortivespun off Vontier.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-10-07",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "POOL",
        "name": "Pool Corporation",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "ETFC",
        "name": "E-Trade",
        "sector": "Financials"
      },
      "reason": "Morgan Stanley 收购 E*Trade，Pool Corp 调入 S&P 500 顶替。",
      "reasonEn": "Morgan Stanley acquired E*Trade.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-09-21",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ETSY",
        "name": "Etsy",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "HRB",
        "name": "H&R Block",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Etsy 调入,H&R Block 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-09-21",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "TER",
        "name": "Teradyne",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "COTY",
        "name": "Coty",
        "sector": "Consumer Staples"
      },
      "reason": "季度再平衡:Teradyne 调入,Coty 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-09-21",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "CTLT",
        "name": "Catalent",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "KSS",
        "name": "Kohl's",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Catalent 调入,Kohl's 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-06-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "BIO",
        "name": "Bio-Rad Laboratories",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "ADS",
        "name": "Alliance Data Systems",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:Bio-Rad Laboratories 调入,Alliance Data Systems 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-06-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "TDY",
        "name": "Teledyne",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "HOG",
        "name": "Harley-Davidson",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Teledyne 调入,Harley-Davidson 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-06-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "TYL",
        "name": "Tyler Technologies",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "JWN",
        "name": "Nordstrom",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Tyler Technologies 调入,Nordstrom 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-05-22",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "WST",
        "name": "West Pharmaceutical Services",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "HP",
        "name": "Helmerich & Payne",
        "sector": "Energy"
      },
      "reason": "季度再平衡:West Pharmaceutical Services 调入,Helmerich & Payne 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-05-12",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "DPZ",
        "name": "Domino's Pizza",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "CPRI",
        "name": "Capri Holdings",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Domino's Pizza 调入,Capri Holdings 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-05-12",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "DXCM",
        "name": "Dexcom",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "AGN",
        "name": "Allergan",
        "sector": "Health Care"
      },
      "reason": "AbbVie 收购 Allergan，DexCom 调入 S&P 500 顶替。",
      "reasonEn": "Allergan acquired by Abb Vie.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-04-06",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "M",
        "name": "Macy's",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡: 调入,Macy's 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-04-06",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "removal": {
        "ticker": "RTN",
        "name": "Raytheon Company",
        "sector": "Industrials"
      },
      "reason": "United Technologies 分拆 Otis 与 Carrier 后同时完成对 Raytheon 的合并，原 Raytheon(RTN) 被调出。",
      "reasonEn": "United Technologies spun off Otis and Carrier and acquired Raytheon Company.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-04-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "OTIS",
        "name": "Otis Worldwide",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": "United Technologies 分拆 Otis，Otis 作为独立公司调入 S&P 500。",
      "reasonEn": "United Technologies spun off Otis and Carrier and acquired Raytheon Company.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-04-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CARR",
        "name": "Carrier",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": "United Technologies 分拆 Carrier，Carrier 作为独立公司调入 S&P 500。",
      "reasonEn": "United Technologies spun off Otis and Carrier and acquired Raytheon Company.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-04-01",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "HWM",
        "name": "Howmet Aerospace",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "ARNC",
        "name": "Arconic",
        "sector": "Industrials"
      },
      "reason": "Arconic 拆分为两家公司，Howmet Aerospace (HWM) 保留指数席位并更名，原 ARNC 被调出。",
      "reasonEn": "Arconic separated into 2 companies - Howmet remained on the index.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-03-02",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "IR",
        "name": "Ingersoll Rand",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "XEC",
        "name": "Cimarex Energy",
        "sector": "Energy"
      },
      "reason": "Gardner Denver 收购 Ingersoll-Rand 工业业务后改名为新 Ingersoll Rand，IR 调入 S&P 500 顶替 Cimarex Energy。",
      "reasonEn": "Gardner Denver acquired Ingersoll Rand's industrial businesses then changed its name to the \"new\" Ingersoll Rand Inc.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2020-01-28",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "PAYC",
        "name": "Paycom",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "WCG",
        "name": "WellCare",
        "sector": "Health Care"
      },
      "reason": "S&P 500 成分股 Centene 收购 WellCare Health Plans，Paycom 调入顶替。",
      "reasonEn": "S&P 500 constituent Centene Corp. (NYSE: CNC) acquired Wellcare Health Plans.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-12-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "LYV",
        "name": "Live Nation Entertainment",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "AMG",
        "name": "Affiliated Managers Group",
        "sector": "Financials"
      },
      "reason": "季度再平衡:Live Nation Entertainment 调入,Affiliated Managers Group 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-12-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ZBRA",
        "name": "Zebra Technologies",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "TRIP",
        "name": "TripAdvisor",
        "sector": "Communication Services"
      },
      "reason": "季度再平衡:Zebra Technologies 调入,TripAdvisor 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-12-23",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "STE",
        "name": "Steris",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "MAC",
        "name": "Macerich",
        "sector": "Real Estate"
      },
      "reason": "季度再平衡:Steris 调入,Macerich 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-12-09",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ODFL",
        "name": "Old Dominion Freight Line",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "STI",
        "name": "SunTrust Banks",
        "sector": "Financials"
      },
      "reason": "BB&T 与 SunTrust 合并组成 Truist Financial，Old Dominion Freight Line 调入 S&P 500 顶替 SunTrust。",
      "reasonEn": "BB&T acquired Sun Trust to form Truist Financial.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-12-05",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "WRB",
        "name": "W. R. Berkley Corporation",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "VIAB",
        "name": "Viacom",
        "sector": "Communication Services"
      },
      "reason": "CBS 与 Viacom 合并成立 ViacomCBS，W. R. Berkley 调入 S&P 500 顶替。",
      "reasonEn": "CBS acquired Viacom to form Viacom CBS.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-11-21",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "NOW",
        "name": "ServiceNow",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "CELG",
        "name": "Celgene",
        "sector": "Health Care"
      },
      "reason": "Bristol-Myers Squibb 收购 Celgene，ServiceNow 调入 S&P 500 顶替。",
      "reasonEn": "Bristol-Myers Squibb(NYSE:BMY) acquired Celgene.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-10-03",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "LVS",
        "name": "Las Vegas Sands",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "NKTR",
        "name": "Nektar Therapeutics",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:Las Vegas Sands 调入,Nektar Therapeutics 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-09-26",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "NVR",
        "name": "NVR",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "JEF",
        "name": "Jefferies Financial Group",
        "sector": "Financials"
      },
      "reason": "Jefferies Financial Group 因分拆被调出,NVR 调入 S&P 500。",
      "reasonEn": "JEF spun off SPB.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-09-23",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CDW",
        "name": "CDW Corporation",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "TSS",
        "name": "TSYS",
        "sector": "Information Technology"
      },
      "reason": "S&P 500 成分股 Global Payments 收购 TSYS，CDW 调入顶替。",
      "reasonEn": "S&P 500 constituent Global Payments(NYSE: GPN) acquired TSS.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-08-09",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "LDOS",
        "name": "Leidos",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "APC",
        "name": "Anadarko Petroleum",
        "sector": "Energy"
      },
      "reason": "S&P 500/100 成分股 Occidental Petroleum 收购 Anadarko Petroleum，Leidos 调入顶替。",
      "reasonEn": "S&P 500 & 100 constituent Occidental Petroleum Corp. (NYSE:OXY) acquired Anadarko Petroleum.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-08-09",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "IEX",
        "name": "IDEX Corporation",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "FL",
        "name": "Foot Locker",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:IDEX Corporation 调入,Foot Locker 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-07-15",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "TMUS",
        "name": "T-Mobile US",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "RHT",
        "name": "Red Hat",
        "sector": "Information Technology"
      },
      "reason": "S&P 500/100 成分股 IBM 收购 Red Hat，T-Mobile 调入顶替。",
      "reasonEn": "S&P 500 & 100 constituent IBM acquired Red Hat.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-07-01",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "MKTX",
        "name": "MarketAxess",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "LLL",
        "name": "L3 Technologies",
        "sector": "Industrials"
      },
      "reason": "Harris Corporation 收购 L3 Technologies 合并为 L3Harris，MarketAxess 调入 S&P 500 顶替。",
      "reasonEn": "L3 purchased by Harris Corporation",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-06-11",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "AMCR",
        "name": "Amcor",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "BMS",
        "name": "Bemis",
        "sector": "Materials"
      },
      "reason": "Bemis 与 Amcor 完成合并，Amcor (AMCR) 延续指数席位，BMS 被调出。",
      "reasonEn": "BMS changed to AMCR post merger with Amcor;subsequently renamed to Amcor",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-06-07",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "BMS",
        "name": "Bemis",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "MAT",
        "name": "Mattel",
        "sector": "Consumer Discretionary"
      },
      "reason": "Bemis 与 Amcor 合并待完成期间，Bemis 作为存续主体先调入 S&P 500 顶替 Mattel。",
      "reasonEn": "Pending merger of Bemis and Amcor; Bemis treated as the surviving entity.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-06-03",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "DD",
        "name": "DuPont",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "DWDP",
        "name": "DuPont",
        "sector": "Materials"
      },
      "reason": "DowDuPont 分拆 Corteva 后更名为 DuPont de Nemours (DD)，原 DWDP 代码被调出。",
      "reasonEn": "DWDP changed to DD after spinning off Corteva.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-06-03",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "CTVA",
        "name": "Corteva",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "FLR",
        "name": "Fluor Corporation",
        "sector": "Industrials"
      },
      "reason": "Fluor Corporation 因分拆被调出,Corteva 调入 S&P 500。",
      "reasonEn": "CTVA spun off from DWDP (which then changed symbol to DD)",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-04-02",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "DOW",
        "name": "Dow",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "BHF",
        "name": "Brighthouse Financial",
        "sector": "Financials"
      },
      "reason": "Brighthouse Financial 因分拆被调出,Dow 调入 S&P 500。",
      "reasonEn": "DOW spun off from DWDP",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-03-19",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "FOXA",
        "name": "Fox Corporation",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "FOXA",
        "name": "21st Century Fox",
        "sector": "Communication Services"
      },
      "reason": "21st Century Fox 因分拆被调出,Fox Corporation 调入 S&P 500。",
      "reasonEn": "21st Century Fox merged with Disney and some parts spun off as Fox Corporation.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-03-19",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "FOX",
        "name": "Fox Corporation",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "FOX",
        "name": "21st Century Fox",
        "sector": "Communication Services"
      },
      "reason": "21st Century Fox 因分拆被调出,Fox Corporation 调入 S&P 500。",
      "reasonEn": "21st Century Fox merged with Disney and some parts spun off as Fox Corporation.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-02-27",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "WAB",
        "name": "Wabtec",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "GT",
        "name": "The Goodyear Tire & Rubber Company",
        "sector": "Consumer Discretionary"
      },
      "reason": "Wabtec 收购 GE 运输业务，合并后的 Wabtec 调入 S&P 500 顶替 Goodyear。",
      "reasonEn": "WAB acquired GE transportation business",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-02-15",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ATO",
        "name": "Atmos Energy",
        "sector": "Utilities"
      },
      "removal": {
        "ticker": "NFX",
        "name": "Newfield Exploration",
        "sector": "Energy"
      },
      "reason": "Encana 收购 Newfield Exploration，Atmos Energy 调入 S&P 500 顶替。",
      "reasonEn": "ECA acquired NFX",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-01-18",
      "type": "退市/破产",
      "typeEn": "Delisting / bankruptcy",
      "addition": {
        "ticker": "TFX",
        "name": "Teleflex",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "PCG",
        "name": "Pacific Gas & Electric Company",
        "sector": "Utilities"
      },
      "reason": "PG&E 因山火责任申请破产保护，Teleflex 调入 S&P 500 顶替。",
      "reasonEn": "PCG filed for bankruptcy",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2019-01-02",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "FRC",
        "name": "First Republic Bank",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "SCG",
        "name": "SCANA",
        "sector": "Utilities"
      },
      "reason": "Dominion Energy 收购 SCANA，First Republic Bank 调入 S&P 500 顶替。",
      "reasonEn": "Dominion Energy acquired SCANA Corporation",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-12-24",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CE",
        "name": "Celanese",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "ESRX",
        "name": "Express Scripts",
        "sector": "Health Care"
      },
      "reason": "S&P 500 成分股 Cigna 收购 Express Scripts，Celanese 调入顶替。",
      "reasonEn": "S&P 500 constituent Cigna (NYSE: CI) acquired ESRX",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-12-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "LW",
        "name": "Lamb Weston",
        "sector": "Consumer Staples"
      },
      "removal": {
        "ticker": "COL",
        "name": "Rockwell Collins",
        "sector": "Industrials"
      },
      "reason": "United Technologies 收购 Rockwell Collins，Lamb Weston 调入 S&P 500 顶替。",
      "reasonEn": "UTX acquired COL",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-12-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "MXIM",
        "name": "Maxim Integrated",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "AET",
        "name": "Aetna",
        "sector": "Health Care"
      },
      "reason": "CVS Health 收购 Aetna，Maxim Integrated 调入 S&P 500 顶替。",
      "reasonEn": "CVS acquired Aetna",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-12-03",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "FANG",
        "name": "Diamondback Energy",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "SRCL",
        "name": "Stericycle",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:Diamondback Energy 调入,Stericycle 调出。",
      "reasonEn": "Market Capitalization change",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-11-13",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "JKHY",
        "name": "Jack Henry & Associates",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "EQT",
        "name": "EQT Corporation",
        "sector": "Energy"
      },
      "reason": "EQT Corporation 因分拆被调出,Jack Henry & Associates 调入 S&P 500。",
      "reasonEn": "EQT spun off ETRN",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-11-06",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "KEYS",
        "name": "Keysight",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "CA",
        "name": "CA Technologies",
        "sector": "Information Technology"
      },
      "reason": "Broadcom 收购 CA Technologies，Keysight Technologies 调入 S&P 500 顶替。",
      "reasonEn": "CA acquired by Broadcom.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-10-11",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "FTNT",
        "name": "Fortinet",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "EVHC",
        "name": "Envision Healthcare",
        "sector": "Health Care"
      },
      "reason": "KKR 收购 Envision Healthcare，Fortinet 调入 S&P 500 顶替。",
      "reasonEn": "EVHC acquired by KKR.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-10-01",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ROL",
        "name": "Rollins",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "ANDV",
        "name": "Andeavor",
        "sector": "Energy"
      },
      "reason": "Marathon Petroleum 收购 Andeavor，Rollins 调入 S&P 500 顶替。",
      "reasonEn": "ANDV acquired by Marathon Petroleum.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-09-14",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "WCG",
        "name": "WellCare",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "XL",
        "name": "XL Group",
        "sector": "Financials"
      },
      "reason": "AXA 收购 XL Group，WellCare 调入 S&P 500 顶替。",
      "reasonEn": "XL acquired by Axa.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-08-28",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ANET",
        "name": "Arista Networks",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "GGP",
        "name": "GGP",
        "sector": "Real Estate"
      },
      "reason": "Brookfield Property Partners 收购 GGP，Arista Networks 调入 S&P 500 顶替。",
      "reasonEn": "GGP acquired by Brookfield Property Partners.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-07-02",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CPRT",
        "name": "Copart",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "DPS",
        "name": "Dr Pepper Snapple Group",
        "sector": "Consumer Staples"
      },
      "reason": "Keurig 收购 Dr Pepper Snapple 组成 Keurig Dr Pepper，Copart 调入 S&P 500 顶替。",
      "reasonEn": "DPS acquired by Keurig Green Mountain.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-06-20",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "FLT",
        "name": "FleetCor Technologies",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "TWX",
        "name": "Time Warner",
        "sector": "Communication Services"
      },
      "reason": "AT&T 收购 Time Warner，FleetCor Technologies 调入 S&P 500 顶替。",
      "reasonEn": "AT&T acquired Time Warner.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-06-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "BR",
        "name": "Broadridge Financial Solutions",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "RRC",
        "name": "Range Resources",
        "sector": "Energy"
      },
      "reason": "季度再平衡:Broadridge Financial Solutions 调入,Range Resources 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-06-18",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "HFC",
        "name": "HollyFrontier",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "AYI",
        "name": "Acuity Brands",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:HollyFrontier 调入,Acuity Brands 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-06-07",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "TWTR",
        "name": "Twitter",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "MON",
        "name": "Monsanto",
        "sector": "Materials"
      },
      "reason": "Bayer 收购 Monsanto，Twitter 调入 S&P 500 顶替。",
      "reasonEn": "Bayer acquired Monsanto.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-06-05",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "EVRG",
        "name": "Evergy",
        "sector": "Utilities"
      },
      "removal": {
        "ticker": "NAVI",
        "name": "Navient",
        "sector": "Financials"
      },
      "reason": "Westar Energy 与 Great Plains Energy 合并组成 Evergy，Evergy 调入顶替 Navient。",
      "reasonEn": "Westar Energy (NYSE: WR) acquired Great Plains Energy (NYSE: GXP) and changed name to Evergy.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-05-31",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "ABMD",
        "name": "Abiomed",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "WYN",
        "name": "Wyndham Worldwide",
        "sector": "Consumer Discretionary"
      },
      "reason": "Wyndham Worldwide 因分拆被调出,Abiomed 调入 S&P 500。",
      "reasonEn": "Wyndham Worldwide spun off Wyndham Hotels & Resorts(NYSE:WH).",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-04-04",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "MSCI",
        "name": "MSCI",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "CSRA",
        "name": "CSRA",
        "sector": "Information Technology"
      },
      "reason": "S&P 500 成分股 General Dynamics 收购 CSRA，MSCI 调入顶替。",
      "reasonEn": "S&P 500 constituent General Dynamics(NYSE: GD) acquired CSRA.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-03-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "TTWO",
        "name": "Take-Two Interactive",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "SIG",
        "name": "Signet Jewelers",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Take-Two Interactive 调入,Signet Jewelers 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-03-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "SIVB",
        "name": "SVB Financial Group",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "PDCO",
        "name": "Patterson Companies",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:SVB Financial Group 调入,Patterson Companies 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-03-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "NKTR",
        "name": "Nektar Therapeutics",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "CHK",
        "name": "Chesapeake Energy",
        "sector": "Energy"
      },
      "reason": "季度再平衡:Nektar Therapeutics 调入,Chesapeake Energy 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-03-07",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "IPGP",
        "name": "IPG Photonics",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "SNI",
        "name": "Scripps Networks Interactive",
        "sector": "Communication Services"
      },
      "reason": "Discovery Communications 收购 Scripps Networks Interactive，IPG Photonics 调入 S&P 500 顶替。",
      "reasonEn": "Discovery Communications acquired SNI.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2018-01-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "HII",
        "name": "Huntington Ingalls Industries",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "BCR",
        "name": "CR Bard",
        "sector": "Health Care"
      },
      "reason": "Becton Dickinson 收购 C. R. Bard，Huntington Ingalls Industries 调入 S&P 500 顶替。",
      "reasonEn": "Becton Dickinson acquired BCR.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-10-13",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "NCLH",
        "name": "Norwegian Cruise Line Holdings",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "LVLT",
        "name": "Level 3 Communications",
        "sector": "Communication Services"
      },
      "reason": "CenturyLink 收购 Level 3 Communications，Norwegian Cruise Line 调入 S&P 500 顶替。",
      "reasonEn": "Century Link acquired LVLT.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-09-18",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CDNS",
        "name": "Cadence Design Systems",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "SPLS",
        "name": "Staples",
        "sector": "Consumer Discretionary"
      },
      "reason": "Sycamore Partners 收购 Staples，Cadence Design Systems 调入 S&P 500 顶替。",
      "reasonEn": "Sycamore Partners acquired Staples.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-09-01",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "DWDP",
        "name": "DuPont",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "DOW",
        "name": "Dow Chemical Company",
        "sector": "Materials"
      },
      "reason": "Dow Chemical 与 DuPont 完成合并为 DowDuPont，股票代码由 DOW 改为 DWDP。",
      "reasonEn": "The Dow Chemical Company renamed to Dow Du Pont Inc. and ticker changed from DOW to DWDP after acquiring Du Pont.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-09-01",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "SBAC",
        "name": "SBA Communications",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "DD",
        "name": "DuPont",
        "sector": "Materials"
      },
      "reason": "Dow Chemical 完成对 DuPont 的合并，SBA Communications 调入 S&P 500 顶替原 DD 代码。",
      "reasonEn": "The Dow Chemical Company acquired Du Pont.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-08-29",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "Q",
        "name": "QuintilesIMS",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "WFM",
        "name": "Whole Foods Market",
        "sector": "Consumer Staples"
      },
      "reason": "Amazon 收购 Whole Foods Market，CenturyLink (Q) 调入 S&P 500 顶替。",
      "reasonEn": "Amazon acquired Whole Foods Market.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-08-08",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "BHF",
        "name": "Brighthouse Financial",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "AN",
        "name": "AutoNation",
        "sector": "Consumer Discretionary"
      },
      "reason": "AutoNation 因分拆被调出,Brighthouse Financial 调入 S&P 500。",
      "reasonEn": "BHF replaced AN,MET spun off BHF",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-07-26",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "DRE",
        "name": "Duke RealtyCorp",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "RIG",
        "name": "Transocean",
        "sector": "Energy"
      },
      "reason": "季度再平衡:Duke RealtyCorp 调入,Transocean 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-07-26",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "AOS",
        "name": "A. O. Smith",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "BBBY",
        "name": "Bed Bath & Beyond",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:A. O. Smith 调入,Bed Bath & Beyond 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-07-26",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "PKG",
        "name": "Packaging Corporation of America",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "MUR",
        "name": "Murphy Oil",
        "sector": "Energy"
      },
      "reason": "季度再平衡:Packaging Corporation of America 调入,Murphy Oil 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-07-26",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "RMD",
        "name": "ResMed",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "MNK",
        "name": "Mallinckrodt",
        "sector": "Health Care"
      },
      "reason": "季度再平衡:ResMed 调入,Mallinckrodt 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-07-26",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "MGM",
        "name": "MGM Resorts International",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "RAI",
        "name": "Reynolds American",
        "sector": "Consumer Staples"
      },
      "reason": "British American Tobacco 收购 Reynolds American，MGM Resorts 调入 S&P 500 顶替。",
      "reasonEn": "British American Tobacco(NYSE MKT:BTI) acquired Reynolds American.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-07-07",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "BKR",
        "name": "Baker Hughes",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "BHI",
        "name": "Baker Hughes",
        "sector": "Energy"
      },
      "reason": "Baker Hughes 与 GE Oil & Gas 合并成立新公司(BKR)，保留指数席位，原 BHI 被调出。",
      "reasonEn": "Baker Hughes merged with GE Oil & Gas to form new company.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-06-19",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "HLT",
        "name": "Hilton",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "YHOO",
        "name": "Yahoo!",
        "sector": "Communication Services"
      },
      "reason": "Verizon 收购 Yahoo 运营业务，剩余部分更名 Altaba 转为封闭式基金，Hilton 调入 S&P 500 顶替。",
      "reasonEn": "VZ acquired YHOO operations; remainder of YHOO converted to closed-end company known as Altaba.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-06-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ALGN",
        "name": "Align Technology",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "TDC",
        "name": "Teradata",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:Align Technology 调入,Teradata 调出。",
      "reasonEn": "Market capitalization changes.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-06-19",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ANSS",
        "name": "Ansys",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "R",
        "name": "Ryder System",
        "sector": "Industrials"
      },
      "reason": "季度再平衡:Ansys 调入,Ryder System 调出。",
      "reasonEn": "Market capitalization changes.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-06-19",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "RE",
        "name": "Everest Re",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "MJN",
        "name": "Mead Johnson",
        "sector": "Consumer Staples"
      },
      "reason": "Reckitt Benckiser 收购 Mead Johnson Nutrition，Everest Re 调入 S&P 500 顶替。",
      "reasonEn": "Reckitt Benckiser acquired Mead Johnson Nutrition.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-06-02",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "INFO",
        "name": "IHS Markit",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "TGNA",
        "name": "Tegna",
        "sector": "Communication Services"
      },
      "reason": "Tegna 因分拆被调出,IHS Markit 调入 S&P 500。",
      "reasonEn": "TGNA spins off Cars.com",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-04-05",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "IT",
        "name": "Gartner",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "DNB",
        "name": "Dun & Bradstreet",
        "sector": "Industrials"
      },
      "reason": "Gartner 收购 CEB，Gartner 调入 S&P 500 顶替 Dun & Bradstreet。",
      "reasonEn": "IT acquiring CEB",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-04-04",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "DXC",
        "name": "DXC Technology",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "SWN",
        "name": "Southwestern Energy",
        "sector": "Energy"
      },
      "reason": "Southwestern Energy 因分拆被调出,DXC Technology 调入 S&P 500。",
      "reasonEn": "HPE spins off Everett, merged with CSC to form DXC",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-03-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "AMD",
        "name": "Advanced Micro Devices",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "URBN",
        "name": "Urban Outfitters",
        "sector": "Consumer Discretionary"
      },
      "reason": "季度再平衡:Advanced Micro Devices 调入,Urban Outfitters 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-03-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "RJF",
        "name": "Raymond James Financial",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "FTR",
        "name": "Frontier Communications",
        "sector": "Communication Services"
      },
      "reason": "季度再平衡:Raymond James Financial 调入,Frontier Communications 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-03-20",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "ARE",
        "name": "Alexandria Real Estate Equities",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "FSLR",
        "name": "First Solar",
        "sector": "Information Technology"
      },
      "reason": "季度再平衡:Alexandria Real Estate Equities 调入,First Solar 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-03-16",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "SNPS",
        "name": "Synopsys",
        "sector": "Information Technology"
      },
      "removal": {
        "ticker": "HAR",
        "name": "Harman International",
        "sector": "Consumer Discretionary"
      },
      "reason": "Samsung Electronics 收购 Harman International，Synopsys 调入 S&P 500 顶替。",
      "reasonEn": "Samsung Electronics acquired Harman International Industries.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-03-13",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "DISH",
        "name": "Dish Network",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "LLTC",
        "name": "Linear Technology",
        "sector": "Information Technology"
      },
      "reason": "S&P 500 成分股 Analog Devices 收购 Linear Technology，Dish Network 调入顶替。",
      "reasonEn": "S&P 500 constituent Analog Devices(NASD:ADI) acquired Linear Technology.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-03-02",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "REG",
        "name": "Regency Centers",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "ENDP",
        "name": "Endo International",
        "sector": "Health Care"
      },
      "reason": "Regency Centers 收购 Equity One，Regency 调入 S&P 500 顶替 Endo International。",
      "reasonEn": "REG acquires EQY",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-03-01",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "CBOE",
        "name": "Cboe Holdings",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "PBI",
        "name": "Pitney Bowes",
        "sector": "Industrials"
      },
      "reason": "CBOE 收购 Bats Global Markets，CBOE 调入 S&P 500 顶替 Pitney Bowes。",
      "reasonEn": "CBOE acquires BATS",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-02-28",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "INCY",
        "name": "Incyte",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "SE",
        "name": "Spectra Energy",
        "sector": "Energy"
      },
      "reason": "Enbridge 收购 Spectra Energy，Incyte 调入 S&P 500 顶替。",
      "reasonEn": "SE acquired by ENB",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2017-01-05",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "IDXX",
        "name": "Idexx Laboratories",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "STJ",
        "name": "St Jude Medical",
        "sector": "Health Care"
      },
      "reason": "S&P 500/100 成分股 Abbott Laboratories 收购 St. Jude Medical，Idexx Laboratories 调入顶替。",
      "reasonEn": "S&P 100 & 500 constituent Abbott Laboratories (NYSE:ABT) acquired St. Jude Medical.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-12-02",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "MAA",
        "name": "Mid-America Apartments",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "OI",
        "name": "Owens-Illinois",
        "sector": "Materials"
      },
      "reason": "季度再平衡:Mid-America Apartments 调入,Owens-Illinois 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-12-02",
      "type": "市值再平衡",
      "typeEn": "Market-cap rebalance",
      "addition": {
        "ticker": "EVHC",
        "name": "Envision Healthcare",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "LM",
        "name": "Legg Mason",
        "sector": "Financials"
      },
      "reason": "季度再平衡:Envision Healthcare 调入,Legg Mason 调出。",
      "reasonEn": "Market capitalization change.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-11-01",
      "type": "分拆",
      "typeEn": "Spin-off",
      "addition": {
        "ticker": "ARNC",
        "name": "Arconic",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "AA",
        "name": "Alcoa",
        "sector": "Materials"
      },
      "reason": "Alcoa 因分拆被调出,Arconic 调入 S&P 500。",
      "reasonEn": "AA spins off ARNC",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-09-30",
      "type": "委员会裁量",
      "typeEn": "Committee discretion",
      "addition": {
        "ticker": "COTY",
        "name": "Coty",
        "sector": "Consumer Staples"
      },
      "removal": {
        "ticker": "DO",
        "name": "Diamond Offshore Drilling",
        "sector": "Energy"
      },
      "reason": "委员会裁量调整：Coty 调入 S&P 500 顶替 Diamond Offshore Drilling。",
      "reasonEn": "COTY replaces DO",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-09-22",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "COO",
        "name": "The Cooper Companies",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "HOT",
        "name": "Starwood",
        "sector": "Consumer Discretionary"
      },
      "reason": "Marriott 完成收购 Starwood Hotels，Cooper Companies 调入 S&P 500 顶替。",
      "reasonEn": "MAR acquires HOT",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-09-08",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "CHTR",
        "name": "Charter Communications",
        "sector": "Communication Services"
      },
      "removal": {
        "ticker": "EMC",
        "name": "EMC Corporation",
        "sector": "Information Technology"
      },
      "reason": "Dell 收购 EMC，Charter Communications 调入 S&P 500 顶替。",
      "reasonEn": "Dell acquires EMC",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-09-06",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "MTD",
        "name": "Mettler Toledo",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "TYC",
        "name": "Tyco International",
        "sector": "Industrials"
      },
      "reason": "Tyco 与 Johnson Controls 合并(沿用 JCI 代码)，Mettler-Toledo 调入 S&P 500 顶替 TYC。",
      "reasonEn": "TYC acquires JCI (and retains JCI ticker).",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-07-05",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "FTV",
        "name": "Fortive Corp",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "CPGX",
        "name": "Columbia Pipeline Group",
        "sector": "Energy"
      },
      "reason": "TransCanada 收购 Columbia Pipeline，Fortive 调入 S&P 500 顶替。",
      "reasonEn": "CPGX acquired by TRP",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-07-01",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "LNT",
        "name": "Alliant Energy Corp",
        "sector": "Utilities"
      },
      "removal": {
        "ticker": "GAS",
        "name": "AGL Resources",
        "sector": "Utilities"
      },
      "reason": "Southern Company 收购 AGL Resources，Alliant Energy 调入 S&P 500 顶替。",
      "reasonEn": "GAS acquired by SO",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-07-01",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ALB",
        "name": "Albemarle Corporation",
        "sector": "Materials"
      },
      "removal": {
        "ticker": "TE",
        "name": "TECO Energy",
        "sector": "Utilities"
      },
      "reason": "Emera 收购 TECO Energy，Albemarle 调入 S&P 500 顶替。",
      "reasonEn": "TE acquired by EMA",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-06-22",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "FBHS",
        "name": "Fortune Brands Home & Security",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "CVC",
        "name": "Cablevision Systems",
        "sector": "Communication Services"
      },
      "reason": "Altice 收购 Cablevision，Fortune Brands Home & Security 调入 S&P 500 顶替。",
      "reasonEn": "CVC acquired by Altice NV",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-06-03",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "TDG",
        "name": "TransDigm Group",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "BXLT",
        "name": "Baxalta",
        "sector": "Health Care"
      },
      "reason": "Shire 收购 Baxalta，TransDigm Group 调入 S&P 500 顶替。",
      "reasonEn": "SHPG acquiring BXLT",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-05-31",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "AJG",
        "name": "Arthur J. Gallagher & Co.",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "CCE",
        "name": "Coca-Cola Enterprises",
        "sector": "Consumer Staples"
      },
      "reason": "Coca-Cola Enterprises 与欧洲装瓶商合并成立 Coca-Cola European Partners，Arthur J. Gallagher 调入顶替 CCE。",
      "reasonEn": "CCE merging with European bottlers",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-05-23",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "LKQ",
        "name": "LKQ Corporation",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "ARG",
        "name": "Airgas",
        "sector": "Materials"
      },
      "reason": "Air Liquide 收购 Airgas，LKQ 调入 S&P 500 顶替。",
      "reasonEn": "ARG acquired by Air Liquide",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-05-18",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "DLR",
        "name": "Digital Realty",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "TWC",
        "name": "Time Warner Cable",
        "sector": "Communication Services"
      },
      "reason": "Charter Communications 收购 Time Warner Cable，Digital Realty 调入 S&P 500 顶替。",
      "reasonEn": "TWC acquired by CHTR",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-05-13",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "ALK",
        "name": "Alaska Air Group",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "SNDK",
        "name": "SanDisk",
        "sector": "Information Technology"
      },
      "reason": "Western Digital 收购 SanDisk，Alaska Air Group 调入 S&P 500 顶替。",
      "reasonEn": "SNDK acquired by WDC",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-05-03",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "AYI",
        "name": "Acuity Brands",
        "sector": "Industrials"
      },
      "removal": {
        "ticker": "ADT",
        "name": "ADT",
        "sector": "Industrials"
      },
      "reason": "Apollo Global Management 收购 ADT，Acuity Brands 调入 S&P 500 顶替。",
      "reasonEn": "ADT acquired by APO",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-04-25",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "GPN",
        "name": "Global Payments",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "GME",
        "name": "GameStop",
        "sector": "Consumer Discretionary"
      },
      "reason": "Global Payments 收购 Heartland Payment Systems，Global Payments 调入 S&P 500 顶替 GameStop。",
      "reasonEn": "Global Payments is acquiring Heartland Payment Systems",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-04-18",
      "type": "委员会裁量",
      "typeEn": "Committee discretion",
      "addition": {
        "ticker": "ULTA",
        "name": "Ulta Beauty",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "THC",
        "name": "Tenet Healthcare",
        "sector": "Health Care"
      },
      "reason": "委员会裁量调整：Ulta Beauty 调入 S&P 500 顶替 Tenet Healthcare。",
      "reasonEn": "Ulta replaces Tenet",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-04-08",
      "type": "其他调整",
      "typeEn": "Other",
      "addition": {
        "ticker": "UA",
        "name": "Under Armour(Class C)",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "",
        "name": "",
        "sector": ""
      },
      "reason": "Under Armour 发行 C 类股，新代码 UA 与原 UAA 一并纳入指数。",
      "reasonEn": "Under Armour distribution of second class of stock",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-04-04",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "FL",
        "name": "Foot Locker",
        "sector": "Consumer Discretionary"
      },
      "removal": {
        "ticker": "CAM",
        "name": "Cameron International",
        "sector": "Energy"
      },
      "reason": "Schlumberger 收购 Cameron International，Foot Locker 调入 S&P 500 顶替。",
      "reasonEn": "Schlumberger acquired Cameron",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-03-30",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "HOLX",
        "name": "Hologic",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "POM",
        "name": "Pepco Holdings",
        "sector": "Utilities"
      },
      "reason": "Exelon 收购 Pepco Holdings，Hologic 调入 S&P 500 顶替。",
      "reasonEn": "Exelon acquired Pepco.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-03-30",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CNC",
        "name": "Centene Corporation",
        "sector": "Health Care"
      },
      "removal": {
        "ticker": "ESV",
        "name": "Ensco",
        "sector": "Energy"
      },
      "reason": "Centene 收购 Health Net，Centene 调入 S&P 500 顶替 Ensco。",
      "reasonEn": "Centene acquired Health Net.",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-03-07",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "UDR",
        "name": "UDR",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "GMCR",
        "name": "Keurig Green Mountain",
        "sector": "Consumer Staples"
      },
      "reason": "JAB Holding 收购 Keurig Green Mountain 并使其私有化，UDR 调入 S&P 500 顶替。",
      "reasonEn": "JAB Holding Company acquired Keurig Green Mountain",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-03-04",
      "type": "委员会裁量",
      "typeEn": "Committee discretion",
      "addition": {
        "ticker": "AWK",
        "name": "American Water Works",
        "sector": "Utilities"
      },
      "removal": {
        "ticker": "CNX",
        "name": "Consol Energy",
        "sector": "Energy"
      },
      "reason": "委员会裁量调整：American Water Works 调入 S&P 500 顶替 Consol Energy。",
      "reasonEn": "AWK replaces CNX",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-02-22",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "CXO",
        "name": "Concho Resources",
        "sector": "Energy"
      },
      "removal": {
        "ticker": "PCL",
        "name": "Plum Creek Timber",
        "sector": "Real Estate"
      },
      "reason": "Weyerhaeuser 收购 Plum Creek Timber，Concho Resources 调入 S&P 500 顶替。",
      "reasonEn": "PCL taken over by WY",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-02-01",
      "type": "委员会裁量",
      "typeEn": "Committee discretion",
      "addition": {
        "ticker": "CFG",
        "name": "Citizens",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "PCP",
        "name": "Precision Castparts Corporation",
        "sector": "Industrials"
      },
      "reason": "委员会裁量调整：Citizens Financial Group 调入 S&P 500 顶替 Precision Castparts。",
      "reasonEn": "CFG replaces PCP",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-02-01",
      "type": "委员会裁量",
      "typeEn": "Committee discretion",
      "addition": {
        "ticker": "FRT",
        "name": "Federal Realty Investment Trust",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "BRCM",
        "name": "Broadcom Corporation",
        "sector": "Information Technology"
      },
      "reason": "委员会裁量调整：Federal Realty Investment Trust 调入 S&P 500 顶替 Broadcom Corporation。",
      "reasonEn": "FRT replaces BRCM",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-01-19",
      "type": "委员会裁量",
      "typeEn": "Committee discretion",
      "addition": {
        "ticker": "EXR",
        "name": "Extra Space Storage",
        "sector": "Real Estate"
      },
      "removal": {
        "ticker": "ACE",
        "name": "Chubb",
        "sector": "Financials"
      },
      "reason": "ACE Limited 收购 Chubb 并沿用 CB 代码，释放 ACE 代码，Extra Space Storage 调入 S&P 500 顶替。",
      "reasonEn": "EXR replaces ACE as ACE Ltd acquires Chubb and retains the CB ticker, giving up ACE",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    },
    {
      "effectiveDate": "2016-01-05",
      "type": "并购触发",
      "typeEn": "M&A trigger",
      "addition": {
        "ticker": "WLTW",
        "name": "Willis Towers Watson",
        "sector": "Financials"
      },
      "removal": {
        "ticker": "FOSL",
        "name": "Fossil Group",
        "sector": "Consumer Discretionary"
      },
      "reason": "Willis Group 与 Towers Watson 合并成立 Willis Towers Watson (WLTW)，WLTW 调入 S&P 500；Fossil Group 因市值下滑同期被调出。",
      "reasonEn": "WSH merges with TW (and renames to WLTW)",
      "sourceUrl": "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies#Selected_changes_to_the_list_of_S%26P_500_components"
    }
  ]
}