after_hours_by_month
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 2026-10-02, from when-historical-market-data-is-revised.
| month | month_label | outside_rth_volume_pct | outside_rth_bars_pct |
|---|---|---|---|
| 2024-10-01 | Oct 2024 | 9.13 | 45.94 |
| 2024-11-01 | Nov 2024 | 8.36 | 44.7 |
| 2024-12-01 | Dec 2024 | 10.35 | 43.55 |
| 2025-01-01 | Jan 2025 | 8.45 | 50.26 |
| 2025-02-01 | Feb 2025 | 9.13 | 46.89 |
| 2025-03-01 | Mar 2025 | 6.22 | 47.01 |
| 2025-04-01 | Apr 2025 | 6.62 | 53.5 |
| 2025-05-01 | May 2025 | 9.19 | 51.97 |
| 2025-06-01 | Jun 2025 | 5.77 | 51.12 |
| 2025-07-01 | Jul 2025 | 8.94 | 49.05 |
| 2025-08-01 | Aug 2025 | 6.17 | 47.09 |
| 2025-09-01 | Sep 2025 | 6.7 | 48.46 |
| 2025-10-01 | Oct 2025 | 7.24 | 47.22 |
| 2025-11-01 | Nov 2025 | 8.42 | 44.36 |
| 2025-12-01 | Dec 2025 | 9 | 39.95 |
| 2026-01-01 | Jan 2026 | 9.56 | 48.58 |
| 2026-02-01 | Feb 2026 | 6.56 | 45.23 |
| 2026-03-01 | Mar 2026 | 7.31 | 42.05 |
| 2026-04-01 | Apr 2026 | 9.75 | 48.58 |
| 2026-05-01 | May 2026 | 7.7 | 53.54 |
| 2026-06-01 | Jun 2026 | 6.73 | 54.26 |
| 2026-07-01 | Jul 2026 | 7.62 | 54.02 |
| 2026-08-01 | Aug 2026 | 9.97 | 54.91 |
| 2026-09-01 | Sep 2026 | 6.38 | 54.01 |
- Rows × columns
- 24 × 4
- Period covered
- to
- 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 |
|---|---|---|---|
month |
date | 2024-10-01 to 2026-09-01 | |
month_label |
text | 24 distinct values (Apr 2025, Apr 2026, Aug 2025…) | |
outside_rth_volume_pct |
number | 5.77 to 10.35 | percent |
outside_rth_bars_pct |
number | 39.95 to 54.91 | 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.
WITH tape AS
(
SELECT
toStartOfMonth(toTimeZone(window_start, 'America/New_York')) AS m,
toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York')) AS et_minute,
volume
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'AAPL'
AND window_start >= '2024-10-01 04:00:00'
AND window_start < '2026-10-01 04:00:00'
)
SELECT
toString(m) AS month,
formatDateTime(m, '%b %Y') AS month_label,
round(100 * sumIf(volume, et_minute < 570 OR et_minute >= 960) / sum(volume), 2) AS outside_rth_volume_pct,
round(100 * countIf(et_minute < 570 OR et_minute >= 960) / count(), 2) AS outside_rth_bars_pct
FROM tape
GROUP BY m, month_label
ORDER BY m
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