SPY volume by ET clock minute around the open, 13 March vs 20 March 2026

Answered against 22 years of US equities and 12 years of US options data and published with the query that produced it. This result is stored as of 2026-08-16, from When Is SQ Day for Nikkei 225 Options?.

Rows × columns

46 × 3

Period covered

09:15 to 10:00

Computed

2026-08-16

Completeness

No missing values

Source

US exchange, SIP and OPRA market data

Licence

Strasmore terms · free, no signup

Formats

JSON · CSV · the SQL below

What each column holds

Computed from Strasmore's warehouse of US exchange, SIP and OPRA market data. Equity prices are delayed; options greeks and implied volatility are end-of-day. This result is stored, not recomputed on load — it is exactly the numbers that were returned on 2026-08-16, and the query below is what returned them.

SELECT
    formatDateTime(toTimeZone(window_start, 'America/New_York'), '%H:%i')  AS et_time,
    round(sumIf(toFloat64(volume),
                toDate(toTimeZone(window_start, 'America/New_York')) = '2026-03-20') / 1000, 1) AS settlement_friday_volume_k,
    round(sumIf(toFloat64(volume),
                toDate(toTimeZone(window_start, 'America/New_York')) = '2026-03-13') / 1000, 1) AS ordinary_friday_volume_k
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
  AND window_start >= '2026-03-13 00:00:00'
  AND window_start <  '2026-03-21 00:00:00'
  AND toDate(toTimeZone(window_start, 'America/New_York')) IN ('2026-03-13', '2026-03-20')
  AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
       + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 555 AND 600
GROUP BY et_time
ORDER BY et_time