extended_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 2026-10-03, from us-premarket-and-after-hours-japan-time.
| ticker | premarket_pct | regular_pct | afterhours_pct |
|---|---|---|---|
| SPY | 2.28 | 83.44 | 14.28 |
| NVDA | 3.59 | 91.36 | 5.05 |
| MSFT | 2.91 | 91.7 | 5.39 |
| AAPL | 2.25 | 92.43 | 5.32 |
| AMZN | 2.34 | 92.45 | 5.21 |
| KO | 0.92 | 94.13 | 4.95 |
- Rows × columns
- 6 × 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 | 6 distinct values (AAPL, AMZN, KO…) | |
premarket_pct |
number | 0.92 to 3.59 | percent |
regular_pct |
number | 83.44 to 94.13 | percent |
afterhours_pct |
number | 4.95 to 14.28 | 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.
SELECT
ticker,
round(100 * sumIf(volume, et_minutes < 570) / sum(volume), 2) AS premarket_pct,
round(100 * sumIf(volume, et_minutes >= 570 AND et_minutes < 960) / sum(volume), 2) AS regular_pct,
round(100 * sumIf(volume, et_minutes >= 960) / sum(volume), 2) AS afterhours_pct
FROM
(
SELECT
ticker,
volume,
toHour(toTimeZone(window_start, 'America/New_York')) * 60
+ toMinute(toTimeZone(window_start, 'America/New_York')) AS et_minutes
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker IN ('SPY', 'AAPL', 'MSFT', 'NVDA', 'AMZN', 'KO')
AND window_start >= today() - 120
AND window_start < today() - 2
)
GROUP BY ticker
ORDER BY premarket_pct + afterhours_pct DESC
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