uk_clock_map
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 2026-10-01, from us-premarket-and-after-hours-uk-time.
| et_time | london_time | avg_session_volume_k | share_of_day_pct |
|---|---|---|---|
| 04:00 | 09:00 | 239.5 | 0.56 |
| 05:00 | 10:00 | 168.4 | 0.4 |
| 06:00 | 11:00 | 181.9 | 0.43 |
| 07:00 | 12:00 | 356.2 | 0.84 |
| 08:00 | 13:00 | 1497.9 | 3.52 |
| 09:00 | 14:00 | 4831.6 | 11.36 |
| 10:00 | 15:00 | 5017 | 11.8 |
| 11:00 | 16:00 | 4700.2 | 11.05 |
| 12:00 | 17:00 | 3144.8 | 7.4 |
| 13:00 | 18:00 | 2814.1 | 6.62 |
| 14:00 | 19:00 | 4368.3 | 9.78 |
| 15:00 | 20:00 | 10170.3 | 22.78 |
| 16:00 | 21:00 | 5502.3 | 12.32 |
| 17:00 | 22:00 | 375.5 | 0.84 |
| 18:00 | 23:00 | 95.6 | 0.21 |
| 19:00 | 00:00 | 39.4 | 0.09 |
- Rows × columns
- 16 × 4
- 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 |
|---|---|---|---|
et_time |
text | 16 distinct values (04:00, 05:00, 06:00…) | |
london_time |
text | 16 distinct values (00:00, 09:00, 10:00…) | |
avg_session_volume_k |
number | 39.4 to 10,170.3 | count |
share_of_day_pct |
number | 0.09 to 22.78 | 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 bars AS
(
SELECT
toTimeZone(window_start, 'America/New_York') AS et,
toTimeZone(window_start, 'Europe/London') AS uk,
volume
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= '2026-09-01 00:00:00'
AND window_start < '2026-10-01 00:00:00'
AND toHour(toTimeZone(window_start, 'America/New_York')) BETWEEN 4 AND 19
)
SELECT
formatDateTime(toStartOfHour(et), '%H:%i') AS et_time,
formatDateTime(toStartOfHour(uk), '%H:%i') AS london_time,
round(sum(volume) / countDistinct(toDate(et)) / 1000, 1) AS avg_session_volume_k,
round(100 * sum(volume) / (SELECT sum(volume) FROM bars), 2) AS share_of_day_pct
FROM bars
GROUP BY et_time, london_time
ORDER BY et_time
Work with this data in your AI assistant
Opens ready to query, with this page's data. Free, no account.