{"slug":"what-is-a-block-trade","qid":"spy_block_share","label":"The same block scan on SPY: July 6, 2026","post_title":"What Is a Block Trade? Big Prints & the Data","post_url":"/blog/what-is-a-block-trade#q-spy_block_share","columns":["total_prints","block_prints","block_pct_of_prints","total_volume_m","block_volume_m","block_pct_of_volume","median_trade_shares"],"rows":[{"total_prints":669171,"block_prints":79,"block_pct_of_prints":0.01,"total_volume_m":50.8,"block_volume_m":13.8,"block_pct_of_volume":27.1,"median_trade_shares":34}],"shape":"scalar","sql":"SELECT\n    count() AS total_prints,\n    countIf(size >= 10000) AS block_prints,\n    round(100.0 * countIf(size >= 10000) / count(), 2) AS block_pct_of_prints,\n    round(toFloat64(sum(size)) / 1e6, 1) AS total_volume_m,\n    round(toFloat64(sumIf(size, size >= 10000)) / 1e6, 1) AS block_volume_m,\n    round(100.0 * toFloat64(sumIf(size, size >= 10000)) / toFloat64(sum(size)), 1) AS block_pct_of_volume,\n    round(quantileDeterministic(0.5)(toFloat64(size), toUInt64(sip_timestamp))) AS median_trade_shares\nFROM global_markets.stocks_trades\nWHERE ticker = 'SPY'\n  AND sip_timestamp >= '2026-07-06 00:00:00' AND sip_timestamp < '2026-07-07 00:00:00'\n  AND NOT hasAny(conditions, [15, 16, 38])","computed_at":"2026-07-26T06:20:42.195467+00:00","elapsed":0.088185659}