session_share
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 2026-10-08, from us-premarket-and-after-hours-india-time.
| ticker | premarket_pct | regular_pct | afterhours_pct |
|---|---|---|---|
| AAPL | 1.889 | 93.624 | 4.487 |
| KO | 0.79 | 92.705 | 6.505 |
| MSFT | 2.678 | 92.064 | 5.258 |
| NVDA | 4.351 | 89.956 | 5.693 |
- Rows × columns
- 4 × 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 |
|---|---|---|---|
ticker |
text | 4 distinct values (AAPL, KO, MSFT…) | |
premarket_pct |
number | 0.79 to 4.351 | percent |
regular_pct |
number | 89.956 to 93.624 | percent |
afterhours_pct |
number | 4.487 to 6.505 | 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
ticker,
(toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) AS et_min,
volume
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker IN ('AAPL', 'KO', 'MSFT', 'NVDA')
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')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) >= 240
AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York'))) < 1200
)
SELECT
ticker,
round(100 * sumIf(volume, et_min >= 240 AND et_min < 570) / sum(volume), 3) AS premarket_pct,
round(100 * sumIf(volume, et_min >= 570 AND et_min < 960) / sum(volume), 3) AS regular_pct,
round(100 * sumIf(volume, et_min >= 960 AND et_min < 1200) / sum(volume), 3) AS afterhours_pct
FROM bars
GROUP BY ticker
ORDER BY ticker
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