{"slug":"tape-a-b-and-c-explained","qid":"tape_mix_by_hour","label":"tape_mix_by_hour","post_title":"tape-a-b-and-c-explained","post_url":"/blog/tape-a-b-and-c-explained#q-tape_mix_by_hour","columns":["et_time","tape_a_pct","tape_b_pct","tape_c_pct"],"rows":[{"et_time":"04:00","tape_a_pct":14,"tape_b_pct":0,"tape_c_pct":86},{"et_time":"05:00","tape_a_pct":12.2,"tape_b_pct":0,"tape_c_pct":87.8},{"et_time":"06:00","tape_a_pct":11.7,"tape_b_pct":0,"tape_c_pct":88.3},{"et_time":"07:00","tape_a_pct":16,"tape_b_pct":0,"tape_c_pct":84},{"et_time":"08:00","tape_a_pct":20.9,"tape_b_pct":0,"tape_c_pct":79.1},{"et_time":"09:00","tape_a_pct":23,"tape_b_pct":0,"tape_c_pct":77},{"et_time":"10:00","tape_a_pct":25.4,"tape_b_pct":0,"tape_c_pct":74.6},{"et_time":"11:00","tape_a_pct":24.7,"tape_b_pct":0,"tape_c_pct":75.3},{"et_time":"12:00","tape_a_pct":27.5,"tape_b_pct":0,"tape_c_pct":72.5},{"et_time":"13:00","tape_a_pct":31.5,"tape_b_pct":0,"tape_c_pct":68.5},{"et_time":"14:00","tape_a_pct":32.9,"tape_b_pct":0,"tape_c_pct":67.1},{"et_time":"15:00","tape_a_pct":35.4,"tape_b_pct":0,"tape_c_pct":64.6},{"et_time":"16:00","tape_a_pct":26.8,"tape_b_pct":0,"tape_c_pct":73.2},{"et_time":"17:00","tape_a_pct":10.7,"tape_b_pct":0,"tape_c_pct":89.3},{"et_time":"18:00","tape_a_pct":9.8,"tape_b_pct":0,"tape_c_pct":90.2},{"et_time":"19:00","tape_a_pct":9.5,"tape_b_pct":0,"tape_c_pct":90.5}],"shape":"series","sql":"SELECT\n    formatDateTime(toStartOfHour(toTimeZone(sip_timestamp, 'America/New_York')), '%H:%i') AS et_time,\n    round(100 * countIf(tape = 1) / count(), 1) AS tape_a_pct,\n    round(100 * countIf(tape = 2) / count(), 1) AS tape_b_pct,\n    round(100 * countIf(tape = 3) / count(), 1) AS tape_c_pct\nFROM global_markets.stocks_trades\nWHERE ticker IN ('AAPL', 'MSFT', 'NVDA', 'QQQ', 'KO', 'JNJ', 'XOM', 'WMT', 'SPY', 'IWM', 'GLD', 'HYG')\n  AND sip_timestamp >= toDateTime64('2026-09-15 04:00:00', 9, 'UTC')\n  AND sip_timestamp <  toDateTime64('2026-09-16 04:00:00', 9, 'UTC')\nGROUP BY et_time\nHAVING count() >= 100\nORDER BY et_time","computed_at":"2026-10-01T16:14:45.279750+00:00","elapsed":0.003063022}