{"slug":"how-to-read-the-equity-trade-tape","qid":"cutover_week","label":"Placeholder share by session, five large names, July to August 2015","post_title":"How to Read the US Equity Trade Tape","post_url":"/blog/how-to-read-the-equity-trade-tape#q-cutover_week","columns":["day","prints","placeholder_pct"],"rows":[{"day":"2015-07-20","prints":568996,"placeholder_pct":100},{"day":"2015-07-21","prints":788192,"placeholder_pct":100},{"day":"2015-07-22","prints":1072877,"placeholder_pct":100},{"day":"2015-07-23","prints":562605,"placeholder_pct":100},{"day":"2015-07-24","prints":537141,"placeholder_pct":100},{"day":"2015-07-27","prints":618850,"placeholder_pct":0},{"day":"2015-07-28","prints":531653,"placeholder_pct":0},{"day":"2015-07-29","prints":519836,"placeholder_pct":0},{"day":"2015-07-30","prints":483625,"placeholder_pct":0},{"day":"2015-07-31","prints":582486,"placeholder_pct":0},{"day":"2015-08-03","prints":738860,"placeholder_pct":0},{"day":"2015-08-04","prints":999499,"placeholder_pct":0},{"day":"2015-08-05","prints":829481,"placeholder_pct":0},{"day":"2015-08-06","prints":593045,"placeholder_pct":0},{"day":"2015-08-07","prints":512989,"placeholder_pct":0}],"shape":"series","sql":"SELECT\n    toString(toDate(sip_timestamp))                                                       AS day,\n    count()                                                                               AS prints,\n    round(100 * countIf(toUnixTimestamp64Nano(participant_timestamp) = 0) / count(), 1)   AS placeholder_pct\nFROM global_markets.stocks_trades\nWHERE ticker IN ('IBM', 'MSFT', 'AAPL', 'GE', 'XOM')\n  AND sip_timestamp >= '2015-07-20' AND sip_timestamp < '2015-08-08'\nGROUP BY day\nORDER BY day","computed_at":"2026-09-15T01:15:13.486986+00:00","elapsed":0.001681616}