COUNTERPOINT · 1985—現在 — どれだけ下げ、どれだけ戻るか
現 S&P 500 構成銘柄の 1985 年以降の最大ドローダウンを深さ別に 11 区分：銘柄数、前回高値の回復率、平均所要年数。緑は当サイトの再計算、赤破線は元研究の全サンプル（上場廃止含む 6,500 銘柄超）。
What this page answers
This static page is built to answer searches for COUNTERPOINT · 1985—現在. It summarizes the live dataset behind the どれだけ下げ、どれだけ戻るか panel and links to the full interactive chart.
現 S&P 500 構成銘柄の 1985 年以降の最大ドローダウンを深さ別に 11 区分：銘柄数、前回高値の回復率、平均所要年数。緑は当サイトの再計算、赤破線は元研究の全サンプル（上場廃止含む 6,500 銘柄超）。 The data is refreshed by the History of Market pipeline and published as a stable JSON endpoint for research, citation, and AI-agent use.
Latest Snapshot
- Updated
- 2026-07-11
Static Preview
Data & Source
GET /api/latest/dd-study.json — Canonical dataset endpoint.
Yahoo Finance · Macrotrends · Robert Shiller · FRED · S&P Global · Nasdaq · NBER.
FAQ
Where does this data come from?
History of Market combines public market and macro datasets including Yahoo Finance, Macrotrends, Robert Shiller, FRED, S&P Global, Nasdaq, and NBER. The exact endpoint for this panel is linked below.
How often is it updated?
Daily-tier datasets refresh after the U.S. market close, with a broader weekly refresh on Sunday. The timestamp shown on this page comes from the JSON payload.
Can I use the data?
Yes, for research and education with attribution to History of Market. Upstream data sources retain their own terms.