STRASMORE/EXPLORE 2,170 QUERIES

Unscheduled closures on the tape: zero regular-session bars on an ordinary weekday

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 2026-08-25, from Is the Stock Market Open Today?.

as of series 5×4read in context →
Unscheduled closures on the tape: zero regular-session bars on an ordinary weekday — 5 rows by 4 columns, computed from US exchange, SIP and OPRA data.
closure_datefalls_onnamespy_regular_session_bars
2012-10-29MonHurricane Sandy — day 10
2012-10-30TueHurricane Sandy — day 20
2012-10-31WedReopening after Sandy390
2018-12-05WedMourning — George H. W. Bush0
2025-01-09ThuMourning — Jimmy Carter0
Rows × columns
5 × 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 Unscheduled closures on the tape: zero regular-session bars on an ordinary weekday, derived from the stored result.
ColumnTypeRangeNotes
closure_date date 2012-10-29 to 2025-01-09
falls_on text 4 distinct values (Mon, Thu, Tue…)
name text 5 distinct values
spy_regular_session_bars number 0 to 390

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.

the exact SQL behind every number 
WITH events AS (
    SELECT arrayJoin([
        (toDate('2012-10-29'), 'Hurricane Sandy — day 1'),
        (toDate('2012-10-30'), 'Hurricane Sandy — day 2'),
        (toDate('2012-10-31'), 'Reopening after Sandy'),
        (toDate('2018-12-05'), 'Mourning — George H. W. Bush'),
        (toDate('2025-01-09'), 'Mourning — Jimmy Carter')
    ]) AS e
),
tape AS (
    SELECT toDate(toTimeZone(window_start, 'America/New_York')) AS d, count() AS bars
    FROM global_markets.delayed_stocks_minute_aggs
    WHERE ticker = 'SPY'
      AND ((window_start >= '2012-10-29 00:00:00' AND window_start < '2012-11-01 12:00:00')
        OR (window_start >= '2018-12-05 00:00:00' AND window_start < '2018-12-06 12:00:00')
        OR (window_start >= '2025-01-09 00:00:00' AND window_start < '2025-01-10 12:00:00'))
      AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959
    GROUP BY d
)
SELECT toString(e.1) AS closure_date,
       formatDateTime(e.1, '%a') AS falls_on,
       e.2 AS name,
       toUInt32(ifNull(t.bars, 0)) AS spy_regular_session_bars
FROM events
LEFT JOIN tape AS t ON t.d = events.e.1
ORDER BY e.1

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