Dollar volume by half hour: witching Thursday (Jun 18, 2026) vs. the ordinary Friday before it (Jun 12)

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 2026-08-14, from Triple Witching 2026 Dates and Volume Data.

Rows × columns

13 × 3

Period covered

09:30 to 15:30

Computed

2026-08-14

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 2026-08-14, and the query below is what returned them.

SELECT formatDateTime(toStartOfInterval(toTimeZone(window_start, 'America/New_York'), INTERVAL 30 minute), '%H:%i') AS et_time,
       round(sumIf(toFloat64(close) * toFloat64(volume),
                   toDate(toTimeZone(window_start, 'America/New_York')) = '2026-06-18') / 1e9, 1) AS witching_dollars_b,
       round(sumIf(toFloat64(close) * toFloat64(volume),
                   toDate(toTimeZone(window_start, 'America/New_York')) = '2026-06-12') / 1e9, 1) AS normal_dollars_b
FROM global_markets.delayed_stocks_minute_aggs
WHERE ((window_start >= '2026-06-12 04:00:00' AND window_start < '2026-06-13 04:00:00')
       OR (window_start >= '2026-06-18 04:00:00' AND window_start < '2026-06-19 04:00:00'))
  AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
       + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959
GROUP BY et_time
ORDER BY et_time