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AAPL: opening-minute and closing-cross share of regular-session volume, by session

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 2026-09-28, from Nasdaq Opening Cross Explained: 4 a.m. to 9:30.

as of series 21×4read in context →
AAPL: opening-minute and closing-cross share of regular-session volume, by session — 21 rows by 4 columns, computed from US exchange, SIP and OPRA data.
sessionopening_minute_pctclosing_cross_pctsession_label
2026-08-032.2414.13August 3
2026-08-041.9522.96August 4
2026-08-052.3315.81August 5
2026-08-062.4516.78August 6
2026-08-072.7621.1August 7
2026-08-103.8116.01August 10
2026-08-112.3418August 11
2026-08-121.7314.53August 12
2026-08-133.1919.14August 13
2026-08-141.9823.22August 14
2026-08-172.3319.23August 17
2026-08-181.917.45August 18
2026-08-191.8614.34August 19
2026-08-201.8321.36August 20
2026-08-2110.5111.77August 21
2026-08-242.7716.72August 24
2026-08-252.9219.37August 25
2026-08-261.9219.92August 26
2026-08-272.5924.22August 27
2026-08-281.6918.77August 28
2026-08-312.0326.7August 31
Rows × columns
21 × 4
Period covered
to
Computed
Completeness
No missing values
Source
US exchange, SIP and OPRA market data
Licence
Strasmore terms · free, no signup
Formats
JSON · CSV · the SQL below

What each column holds

Column definitions for AAPL: opening-minute and closing-cross share of regular-session volume, by session, derived from the stored result.
ColumnTypeRangeNotes
session date 2026-08-03 to 2026-08-31
opening_minute_pct number 1.69 to 10.51 percent
closing_cross_pct number 11.77 to 26.7 percent
session_label text 21 distinct values (August 10, August 11, August 12…)

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
    toString(b.d)                                                               AS session,
    round(100 * b.open_minute / (b.continuous_shares + p.closing_print), 2)    AS opening_minute_pct,
    round(100 * p.closing_print / (b.continuous_shares + p.closing_print), 2)  AS closing_cross_pct,
    concat(monthName(b.d), ' ', toString(toDayOfMonth(b.d)))                    AS session_label
FROM
(
    SELECT
        d,
        sumIf(v, et_min = 570) AS open_minute,
        sum(v)                 AS continuous_shares
    FROM
    (
        SELECT
            toDate(toTimeZone(window_start, 'America/New_York'))        AS d,
            toHour(toTimeZone(window_start, 'America/New_York')) * 60
              + toMinute(toTimeZone(window_start, 'America/New_York')) AS et_min,
            toFloat64(volume)                                           AS v
        FROM global_markets.delayed_stocks_minute_aggs
        WHERE ticker = 'AAPL'
          AND window_start >= '2026-08-03 04:00:00'
          AND window_start <  '2026-09-01 04:00:00'
    )
    WHERE et_min BETWEEN 570 AND 959
    GROUP BY d
    HAVING sum(v) > 0
) AS b
INNER JOIN
(
    SELECT
        toDate(toTimeZone(sip_timestamp, 'America/New_York')) AS d,
        toFloat64(maxIf(size, has(conditions, 8)))            AS closing_print
    FROM global_markets.stocks_trades
    WHERE ticker = 'AAPL'
      AND sip_timestamp >= '2026-08-03 04:00:00'
      AND sip_timestamp <  '2026-09-01 04:00:00'
      AND toHour(toTimeZone(sip_timestamp, 'America/New_York')) = 16
      AND toMinute(toTimeZone(sip_timestamp, 'America/New_York')) < 10
    GROUP BY d
    HAVING countIf(has(conditions, 8)) > 0
) AS p ON p.d = b.d
ORDER BY b.d
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