{"slug":"covid-crash-march-2020","qid":"path_30m","label":"SPY by half-hour: March 9, 2020 regular session","post_title":"COVID Crash 2020: Four Halts, Peak to Trough","post_url":"/blog/covid-crash-march-2020#q-path_30m","columns":["et_time","bucket_close","bucket_low","shares_m"],"rows":[{"et_time":"09:30","bucket_close":279.93,"bucket_low":273.5,"shares_m":17.4},{"et_time":"10:00","bucket_close":280.72,"bucket_low":275.6,"shares_m":23.4},{"et_time":"10:30","bucket_close":278.61,"bucket_low":275.5,"shares_m":19.1},{"et_time":"11:00","bucket_close":281.03,"bucket_low":275.5,"shares_m":17.2},{"et_time":"11:30","bucket_close":282.69,"bucket_low":280.06,"shares_m":19.1},{"et_time":"12:00","bucket_close":281.01,"bucket_low":280.95,"shares_m":17.2},{"et_time":"12:30","bucket_close":279.71,"bucket_low":275.95,"shares_m":13.4},{"et_time":"13:00","bucket_close":278.59,"bucket_low":278.24,"shares_m":11.5},{"et_time":"13:30","bucket_close":275.84,"bucket_low":275.34,"shares_m":19.4},{"et_time":"14:00","bucket_close":274.95,"bucket_low":274.06,"shares_m":21.2},{"et_time":"14:30","bucket_close":276.59,"bucket_low":273.45,"shares_m":25.9},{"et_time":"15:00","bucket_close":277.9,"bucket_low":275.55,"shares_m":24.5},{"et_time":"15:30","bucket_close":274.4,"bucket_low":274.37,"shares_m":46.7}],"shape":"series","sql":"SELECT\n    formatDateTime(toStartOfInterval(toTimeZone(window_start, 'America/New_York'), INTERVAL 30 MINUTE), '%H:%i') AS et_time,\n    round(toFloat64(argMax(close, window_start)), 2) AS bucket_close,\n    round(min(toFloat64(low)), 2) AS bucket_low,\n    round(toFloat64(sum(volume)) / 1e6, 1) AS shares_m\nFROM global_markets.delayed_stocks_minute_aggs\nWHERE ticker = 'SPY'\n  AND window_start >= toDateTime('2020-03-09 04:00:00') AND window_start < toDateTime('2020-03-09 23:59:00')\n  AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959\nGROUP BY et_time\nORDER BY et_time","computed_at":"2026-07-26T05:28:57.225805+00:00","elapsed":0.04165634}