sgt_clock_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 2026-09-25, from us-stock-market-hours-singapore-time.
| sgt_time | january_shares_millions | august_shares_millions |
|---|---|---|
| 00:00 | 4.41 | 1.93 |
| 00:30 | 4.13 | 1.71 |
| 01:00 | 3.43 | 1.52 |
| 01:30 | 3.27 | 1.48 |
| 02:00 | 3.01 | 1.82 |
| 02:30 | 2.89 | 1.82 |
| 03:00 | 3.84 | 2.19 |
| 03:30 | 4.58 | 6.6 |
| 04:00 | 5.09 | 4.11 |
| 04:30 | 12.52 | 0.25 |
| 05:00 | 5.6 | 0.16 |
| 05:30 | 0.66 | 0.09 |
| 06:00 | 0.13 | 0.07 |
| 06:30 | 0.09 | 0.02 |
| 07:00 | 0.08 | 0.02 |
| 07:30 | 0.03 | 0.02 |
| 08:00 | 0.03 | 0 |
| 08:30 | 0.04 | 0 |
| 16:00 | 0 | 0.08 |
| 16:30 | 0 | 0.02 |
| 17:00 | 0.05 | 0.02 |
| 17:30 | 0.04 | 0.01 |
| 18:00 | 0.03 | 0.02 |
| 18:30 | 0.03 | 0.03 |
| 19:00 | 0.04 | 0.08 |
| 19:30 | 0.07 | 0.11 |
| 20:00 | 0.13 | 0.13 |
| 20:30 | 0.1 | 0.22 |
| 21:00 | 0.31 | 0.21 |
| 21:30 | 0.33 | 3.8 |
| 22:00 | 0.42 | 2.7 |
| 22:30 | 9.62 | 2.5 |
| 23:00 | 6.53 | 2.19 |
| 23:30 | 5.86 | 2.24 |
- Rows × columns
- 34 × 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 |
|---|---|---|---|
sgt_time |
text | 34 distinct values (00:00, 00:30, 01:00…) | |
january_shares_millions |
number | 0 to 12.52 | count |
august_shares_millions |
number | 0 to 6.6 | 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
toStartOfInterval(toTimeZone(window_start, 'Asia/Singapore'), INTERVAL 30 MINUTE) AS sgt_bucket,
toDate(toTimeZone(window_start, 'America/New_York')) AS et_date,
volume
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND (
(window_start >= toDateTime('2026-01-05 05:00:00') AND window_start < toDateTime('2026-01-31 05:00:00'))
OR (window_start >= toDateTime('2026-08-03 04:00:00') AND window_start < toDateTime('2026-08-29 04:00:00'))
)
)
SELECT
formatDateTime(sgt_bucket, '%H:%i') AS sgt_time,
round(sumIf(volume, et_date < toDate('2026-04-01'))
/ greatest(uniqExactIf(et_date, et_date < toDate('2026-04-01')), 1) / 1e6, 2) AS january_shares_millions,
round(sumIf(volume, et_date > toDate('2026-04-01'))
/ greatest(uniqExactIf(et_date, et_date > toDate('2026-04-01')), 1) / 1e6, 2) AS august_shares_millions
FROM bars
GROUP BY sgt_time
HAVING january_shares_millions + august_shares_millions > 0
ORDER BY sgt_time
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