session_clock_ist
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 2026-10-07, from us-stock-market-hours-india-time.
| ist_time | et_time | avg_bucket_volume_mn |
|---|---|---|
| 13:30 | 04:00 | 0.08 |
| 14:00 | 04:30 | 0.02 |
| 14:30 | 05:00 | 0.02 |
| 15:00 | 05:30 | 0.02 |
| 15:30 | 06:00 | 0.03 |
| 16:00 | 06:30 | 0.04 |
| 16:30 | 07:00 | 0.09 |
| 17:00 | 07:30 | 0.11 |
| 17:30 | 08:00 | 0.14 |
| 18:00 | 08:30 | 0.26 |
| 18:30 | 09:00 | 0.23 |
| 19:00 | 09:30 | 4.09 |
| 19:30 | 10:00 | 3.05 |
| 20:00 | 10:30 | 2.55 |
| 20:30 | 11:00 | 2.58 |
| 21:00 | 11:30 | 1.98 |
| 21:30 | 12:00 | 1.95 |
| 22:00 | 12:30 | 1.65 |
| 22:30 | 13:00 | 1.73 |
| 23:00 | 13:30 | 1.47 |
| 23:30 | 14:00 | 1.9 |
| 00:00 | 14:30 | 2.22 |
| 00:30 | 15:00 | 2.57 |
| 01:00 | 15:30 | 7.93 |
| 01:30 | 16:00 | 4.88 |
| 02:00 | 16:30 | 0.31 |
| 02:30 | 17:00 | 0.17 |
| 03:00 | 17:30 | 0.12 |
| 03:30 | 18:00 | 0.07 |
| 04:00 | 18:30 | 0.03 |
| 04:30 | 19:00 | 0.02 |
| 05:00 | 19:30 | 0.03 |
- Rows × columns
- 32 × 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 |
|---|---|---|---|
ist_time |
text | 32 distinct values (00:00, 00:30, 01:00…) | |
et_time |
text | 32 distinct values (04:00, 04:30, 05:00…) | |
avg_bucket_volume_mn |
number | 0.02 to 7.93 | count |
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, 'Asia/Kolkata') AS ist,
window_start,
volume
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= today() - 90
AND window_start < today() - 2
)
SELECT
argMax(formatDateTime(toStartOfInterval(ist, INTERVAL 30 MINUTE), '%H:%i'), window_start) AS ist_time,
formatDateTime(toStartOfInterval(et, INTERVAL 30 MINUTE), '%H:%i') AS et_time,
round(toFloat64(sum(volume)) / countDistinct(toDate(et)) / 1e6, 2) AS avg_bucket_volume_mn
FROM bars
WHERE (toHour(et) * 60 + toMinute(et)) >= 240
AND (toHour(et) * 60 + toMinute(et)) < 1200
GROUP BY et_time
ORDER BY min(toHour(et) * 60 + toMinute(et))
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