{"slug":"why-odd-lots-dont-set-the-nbbo","qid":"tier_drift","label":"Listed names averaging above $250 a share, by month","post_title":"Why Odd Lots Don't Set the NBBO","post_url":"/blog/why-odd-lots-dont-set-the-nbbo#q-tier_drift","columns":["month","stocks_above_250"],"rows":[{"month":"2024-08","stocks_above_250":304},{"month":"2024-09","stocks_above_250":323},{"month":"2024-10","stocks_above_250":333},{"month":"2024-11","stocks_above_250":334},{"month":"2024-12","stocks_above_250":324},{"month":"2025-01","stocks_above_250":318},{"month":"2025-02","stocks_above_250":309},{"month":"2025-03","stocks_above_250":282},{"month":"2025-04","stocks_above_250":252},{"month":"2025-05","stocks_above_250":272},{"month":"2025-06","stocks_above_250":285},{"month":"2025-07","stocks_above_250":300},{"month":"2025-08","stocks_above_250":290},{"month":"2025-09","stocks_above_250":308},{"month":"2025-10","stocks_above_250":305},{"month":"2025-11","stocks_above_250":278},{"month":"2025-12","stocks_above_250":281},{"month":"2026-01","stocks_above_250":296},{"month":"2026-02","stocks_above_250":290},{"month":"2026-03","stocks_above_250":264},{"month":"2026-04","stocks_above_250":276},{"month":"2026-05","stocks_above_250":291},{"month":"2026-06","stocks_above_250":307},{"month":"2026-07","stocks_above_250":305}],"shape":"series","sql":"SELECT\n    formatDateTime(m, '%Y-%m') AS month,\n    countIf(avg_close > 250)   AS stocks_above_250\nFROM\n(\n    SELECT\n        toStartOfMonth(date)  AS m,\n        ticker,\n        avg(toFloat64(close)) AS avg_close\n    FROM global_markets.stocks_daily_aggs\n    WHERE date >= toStartOfMonth(today() - 730)\n      AND date <  toStartOfMonth(today())\n      AND close > 0\n    GROUP BY m, ticker\n)\nGROUP BY m\nORDER BY m","computed_at":"2026-08-22T04:36:28.744014+00:00","elapsed":1.685490467}