{"_license": "Reuse with attribution is welcome; copying the work is not. Data (/api/**.json): CC BY 4.0. Charts, share images, embeds and quotes: free to reuse when credited \"History of Market (historyofmarket.com)\" with a link. No derivative or look-alike sites, no use of the brand names, no citation without the source. Terms: https://historyofmarket.com/license/", "_attribution": "History of Market (historyofmarket.com)", "_canonical": "https://historyofmarket.com/api/sp500/daily-extremes.json", "_terms": "https://historyofmarket.com/license/", "updated": "2026-10-10", "ticker": "^GSPC", "startDate": "2000-01-03", "endDate": "2026-10-09", "tradingDays": 6732, "buckets": [{"rank": "top1_50", "days": 50, "cumReturn": 12.369506, "tone": "positive"}, {"rank": "top51_100", "days": 50, "cumReturn": 3.845706, "tone": "positive"}, {"rank": "middle", "days": 6572, "cumReturn": 0.89375, "tone": "neutral"}, {"rank": "worst31_60", "days": 30, "cumReturn": -0.700113, "tone": "negative"}, {"rank": "worst1_30", "days": 30, "cumReturn": -0.8541, "tone": "negative"}], "fullPeriod": {"cumReturn": 4.367944, "annualized": 0.064797, "yearsSpan": 26.77}}