{"slug":"can-you-trade-us-stocks-24-hours","qid":"session_share_by_ticker","label":"Share of weekly volume by session window: seven household names, week of July 13, 2026","post_title":"Can You Trade US Stocks 24 Hours a Day?","post_url":"/blog/can-you-trade-us-stocks-24-hours#q-session_share_by_ticker","columns":["ticker","premarket_pct","core_session_pct","after_hours_pct"],"rows":[{"ticker":"SPY","premarket_pct":2.64,"core_session_pct":86.76,"after_hours_pct":10.6},{"ticker":"PG","premarket_pct":0.25,"core_session_pct":94.03,"after_hours_pct":5.73},{"ticker":"NVDA","premarket_pct":3.21,"core_session_pct":94.38,"after_hours_pct":2.41},{"ticker":"MSFT","premarket_pct":3.07,"core_session_pct":94.43,"after_hours_pct":2.51},{"ticker":"AAPL","premarket_pct":1.67,"core_session_pct":94.54,"after_hours_pct":3.79},{"ticker":"TSLA","premarket_pct":2.38,"core_session_pct":96.13,"after_hours_pct":1.49},{"ticker":"KO","premarket_pct":0.81,"core_session_pct":96.68,"after_hours_pct":2.51}],"shape":"ranking","sql":"WITH bars AS (\n    SELECT ticker,\n           toTimeZone(window_start, 'America/New_York') AS et,\n           toFloat64(volume) AS shares\n    FROM global_markets.delayed_stocks_minute_aggs\n    WHERE ticker IN ('AAPL', 'MSFT', 'NVDA', 'TSLA', 'SPY', 'KO', 'PG')\n      AND window_start >= toDateTime('2026-07-13 08:00:00', 'UTC')\n      AND window_start <  toDateTime('2026-07-18 00:00:00', 'UTC')\n)\nSELECT ticker,\n       round(100 * sumIf(shares, toHour(et) * 60 + toMinute(et) < 570) / sum(shares), 2) AS premarket_pct,\n       round(100 * sumIf(shares, toHour(et) * 60 + toMinute(et) BETWEEN 570 AND 959) / sum(shares), 2) AS core_session_pct,\n       round(100 * sumIf(shares, toHour(et) * 60 + toMinute(et) >= 960) / sum(shares), 2) AS after_hours_pct\nFROM bars\nGROUP BY ticker\nORDER BY premarket_pct + after_hours_pct DESC","computed_at":"2026-08-01T08:25:44.958452+00:00","elapsed":0.003191379}