{"slug":"what-is-gamma-exposure-gex","qid":"top_zero_dte_roots","label":"July 6, 2026: top roots by same-day-expiry options volume","post_title":"What Is Gamma Exposure (GEX)? Dealer Hedging","post_url":"/blog/what-is-gamma-exposure-gex#q-top_zero_dte_roots","columns":["underlying","zero_dte_contracts_mm","pct_of_zero_dte_volume"],"rows":[{"underlying":"SPY","zero_dte_contracts_mm":8.49,"pct_of_zero_dte_volume":36.1},{"underlying":"QQQ","zero_dte_contracts_mm":4.98,"pct_of_zero_dte_volume":21.2},{"underlying":"TSLA","zero_dte_contracts_mm":2.81,"pct_of_zero_dte_volume":11.9},{"underlying":"SPXW","zero_dte_contracts_mm":2.67,"pct_of_zero_dte_volume":11.3},{"underlying":"NVDA","zero_dte_contracts_mm":1.12,"pct_of_zero_dte_volume":4.8},{"underlying":"AAPL","zero_dte_contracts_mm":0.9,"pct_of_zero_dte_volume":3.8},{"underlying":"IWM","zero_dte_contracts_mm":0.81,"pct_of_zero_dte_volume":3.5},{"underlying":"META","zero_dte_contracts_mm":0.36,"pct_of_zero_dte_volume":1.5}],"shape":"ranking","sql":"SELECT root AS underlying,\n       round(sum(volume) / 1e6, 2) AS zero_dte_contracts_mm,\n       round(100.0 * sum(volume) / sum(sum(volume)) OVER (), 1) AS pct_of_zero_dte_volume\nFROM (\n    SELECT substring(ticker, 3, length(ticker) - 17) AS root,\n           toFloat64(volume) AS volume\n    FROM global_markets.options_minute_aggs\n    WHERE window_start >= toDateTime('2026-07-06 08:00:00')\n      AND window_start <  toDateTime('2026-07-07 04:00:00')\n      AND toDate(toTimeZone(window_start, 'America/New_York')) = toDate('2026-07-06')\n      AND toDateOrNull(concat('20', substring(ticker, length(ticker) - 14, 6))) = toDate(toTimeZone(window_start, 'America/New_York'))\n)\nWHERE root != 'SPCX'\nGROUP BY root\nORDER BY sum(volume) DESC\nLIMIT 8","computed_at":"2026-08-13T14:40:10.304999+00:00","elapsed":0.002563291}