summer_curve
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 2026-11-01, from us-stock-market-hours-japan-time.
| jst_time | et_time | volume_share_pct |
|---|---|---|
| 22:00 | 09:00 | 0.43 |
| 22:30 | 09:30 | 8.9 |
| 23:00 | 10:00 | 6.18 |
| 23:30 | 10:30 | 5.02 |
| 00:00 | 11:00 | 4.51 |
| 00:30 | 11:30 | 5.66 |
| 01:00 | 12:00 | 4.18 |
| 01:30 | 12:30 | 3.97 |
| 02:00 | 13:00 | 4.24 |
| 02:30 | 13:30 | 4.26 |
| 03:00 | 14:00 | 5.02 |
| 03:30 | 14:30 | 5.4 |
| 04:00 | 15:00 | 6.96 |
| 04:30 | 15:30 | 18.06 |
| 05:00 | 16:00 | 13.52 |
| 05:30 | 16:30 | 0.91 |
- Rows × columns
- 16 × 3
- Computed
- Completeness
- No missing values
- Source
- US exchange, SIP and OPRA market data
- Licence
- Strasmore terms · free, no signup
What each column holds
| Column | Type | Range | Notes |
|---|---|---|---|
jst_time |
text | 16 distinct values (00:00, 00:30, 01:00…) | |
et_time |
text | 16 distinct values (09:00, 09:30, 10:00…) | |
volume_share_pct |
number | 0.43 to 18.06 | percent |
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 , and the query below is what returned them.
Run it yourself
This is the exact query behind the result above. Change a ticker, a date or a column and run it against the warehouse — no account, no key. The no-signup tier is smaller than the one this page was computed on; a query that reaches past it comes back saying which plan runs it.
SELECT
jst_time,
et_time,
volume_share_pct
FROM
(
SELECT
formatDateTime(toStartOfInterval(toTimeZone(window_start, 'Asia/Tokyo'), INTERVAL 30 MINUTE), '%H:%i') AS jst_time,
formatDateTime(toStartOfInterval(toTimeZone(window_start, 'America/New_York'), INTERVAL 30 MINUTE), '%H:%i') AS et_time,
toHour(toTimeZone(window_start, 'America/New_York')) AS et_hour,
round(100 * sum(toFloat64(volume)) / sum(sum(toFloat64(volume))) OVER (), 2) AS volume_share_pct
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= toDateTime('2026-06-01 00:00:00', 'America/New_York')
AND window_start < toDateTime('2026-07-01 00:00:00', 'America/New_York')
GROUP BY jst_time, et_time, et_hour
)
WHERE et_hour BETWEEN 9 AND 16
ORDER BY et_time
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