{"slug":"us-stock-margin-for-taiwan-investors","qid":"single_day_drops","label":"single_day_drops","post_title":"us-stock-margin-for-taiwan-investors","post_url":"/blog/lang/zh-hant/us-stock-margin-for-taiwan-investors#q-single_day_drops","columns":["label","drop_pct"],"rows":[{"label":"2020-03-16","drop_pct":14.74},{"label":"2009-01-22","drop_pct":11.71},{"label":"2013-07-19","drop_pct":11.4},{"label":"2006-04-28","drop_pct":11.38},{"label":"2026-01-29","drop_pct":9.99},{"label":"2020-03-12","drop_pct":9.48},{"label":"2015-01-27","drop_pct":9.25},{"label":"2008-09-29","drop_pct":8.72},{"label":"2004-11-15","drop_pct":8.61},{"label":"2009-07-24","drop_pct":8.26}],"shape":"ranking","sql":"WITH\n    daily AS\n    (\n        SELECT\n            date                  AS d,\n            toFloat64(max(close)) AS px\n        FROM global_markets.stocks_daily_aggs\n        WHERE ticker = 'MSFT'\n          AND date >= '2003-03-01'\n        GROUP BY d\n    ),\n    chg AS\n    (\n        SELECT\n            d,\n            px,\n            lagInFrame(px) OVER (ORDER BY d ROWS BETWEEN 1 PRECEDING AND CURRENT ROW) AS prev_px\n        FROM daily\n    )\nSELECT\n    formatDateTime(d, '%Y-%m-%d')      AS label,\n    round((1. - px / prev_px) * 100, 2) AS drop_pct\nFROM chg\nWHERE prev_px > 0\n  AND px < prev_px\nORDER BY drop_pct DESC\nLIMIT 10","computed_at":"2026-10-08T15:57:02.370482+00:00","elapsed":0.003355662}