kst_clock_volume
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 us-stock-market-hours-korea-time.
| kst_clock | share_pct | volume_mm |
|---|---|---|
| 17:00 | 0.24 | 5 |
| 18:00 | 0.09 | 1.9 |
| 19:00 | 0.14 | 2.9 |
| 20:00 | 0.47 | 10 |
| 21:00 | 0.9 | 19.3 |
| 22:00 | 10.26 | 218.5 |
| 23:00 | 13.06 | 278 |
| 00:00 | 11.11 | 236.6 |
| 01:00 | 8.43 | 179.5 |
| 02:00 | 7.42 | 158 |
| 03:00 | 9.8 | 208.7 |
| 04:00 | 24.71 | 526.2 |
| 05:00 | 12.31 | 262.1 |
| 06:00 | 0.72 | 15.4 |
| 07:00 | 0.24 | 5.2 |
| 08:00 | 0.1 | 2.1 |
| 09:00 | 0 | 0 |
| 10:00 | 0 | 0 |
| 11:00 | 0 | 0 |
| 12:00 | 0 | 0 |
| 13:00 | 0 | 0 |
| 14:00 | 0 | 0 |
| 15:00 | 0 | 0 |
| 16:00 | 0 | 0 |
- Rows × columns
- 24 × 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 |
|---|---|---|---|
kst_clock |
text | 24 distinct values (00:00, 01:00, 02:00…) | |
share_pct |
number | 0 to 24.71 | percent |
volume_mm |
number | 0 to 526.2 | 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 hours AS
(
SELECT arrayJoin(range(24)) AS kst_h
),
tape AS
(
SELECT
toHour(toTimeZone(window_start, 'Asia/Seoul')) AS kst_h,
sum(volume) AS hour_volume
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= today() - 75
AND window_start < today() - 2
AND volume > 0
GROUP BY kst_h
)
SELECT
concat(leftPad(toString(h.kst_h), 2, '0'), ':00') AS kst_clock,
round(100 * toFloat64(t.hour_volume)
/ sum(toFloat64(t.hour_volume)) OVER (), 2) AS share_pct,
round(toFloat64(t.hour_volume) / 1e6, 1) AS volume_mm
FROM hours AS h
LEFT JOIN tape AS t ON t.kst_h = h.kst_h
ORDER BY (h.kst_h + 7) % 24
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