{"slug":"limited-margin-in-an-ira","qid":"short_share","label":"Reported short sale volume as a share of total volume, past six months","post_title":"Limited Margin in an IRA: Rules and Limits","post_url":"/blog/limited-margin-in-an-ira#q-short_share","columns":["ticker","short_share_pct","busiest_day_pct"],"rows":[{"ticker":"SPY","short_share_pct":54.2,"busiest_day_pct":76.2},{"ticker":"AAPL","short_share_pct":46.5,"busiest_day_pct":63.3},{"ticker":"KO","short_share_pct":43.2,"busiest_day_pct":65.6},{"ticker":"NVDA","short_share_pct":38.7,"busiest_day_pct":57.4},{"ticker":"MSFT","short_share_pct":36.8,"busiest_day_pct":61.4}],"shape":"ranking","sql":"WITH daily AS\n(\n    SELECT\n        date,\n        ticker,\n        max(toFloat64(short_volume)) AS short_vol,\n        max(toFloat64(total_volume)) AS total_vol\n    FROM global_markets.stocks_short_volume\n    WHERE ticker IN ('AAPL', 'MSFT', 'NVDA', 'SPY', 'KO')\n      AND ticker NOT IN ('SPCX')\n      AND date >= today() - 180\n    GROUP BY date, ticker\n    HAVING max(toFloat64(total_volume)) > 0\n)\nSELECT\n    ticker,\n    round(100 * sum(short_vol) / sum(total_vol), 1) AS short_share_pct,\n    round(100 * max(short_vol / total_vol), 1)      AS busiest_day_pct\nFROM daily\nGROUP BY ticker\nORDER BY short_share_pct DESC","computed_at":"2026-10-09T16:40:08.828864+00:00","elapsed":0.122825145}