SPY across recent weekends and holiday weekends: Friday's close vs. the reopening print
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?.
| last_session_before | reopening_session | days_dark | close_before_break | reopening_print | gap_pct |
|---|---|---|---|---|---|
| Fri 2026-06-12 | Mon 2026-06-15 | 3 | 741.63 | 751.85 | 1.38 |
| Thu 2026-06-18 | Mon 2026-06-22 | 4 | 746.56 | 747.7 | 0.15 |
| Fri 2026-06-26 | Mon 2026-06-29 | 3 | 729.09 | 736.52 | 1.02 |
| Thu 2026-07-02 | Mon 2026-07-06 | 4 | 744.8 | 748.74 | 0.53 |
| Fri 2026-07-10 | Mon 2026-07-13 | 3 | 754.9 | 752.47 | -0.32 |
| Fri 2026-07-17 | Mon 2026-07-20 | 3 | 743.2 | 747.06 | 0.52 |
| Fri 2026-07-24 | Mon 2026-07-27 | 3 | 738.85 | 744.91 | 0.82 |
| Fri 2026-07-31 | Mon 2026-08-03 | 3 | 746.81 | 749.44 | 0.35 |
| Fri 2026-08-07 | Mon 2026-08-10 | 3 | 773.2 | 772.6 | -0.08 |
| Fri 2026-08-14 | Mon 2026-08-17 | 3 | 776.3 | 776.18 | -0.02 |
| Fri 2026-08-21 | Mon 2026-08-24 | 3 | 766.95 | 763.28 | -0.48 |
- Rows × columns
- 11 × 6
- Period covered
- 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 |
|---|---|---|---|
last_session_before |
text | 11 distinct values | |
reopening_session |
date | Mon 2026-0 | |
days_dark |
number | 3 to 4 | |
close_before_break |
text | 11 distinct values (729.09, 738.85, 741.63…) | |
reopening_print |
text | 11 distinct values (736.52, 744.91, 747.06…) | |
gap_pct |
number | -0.48 to 1.38 | 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.
the exact SQL behind every number
WITH daily AS (
SELECT toDate(toTimeZone(window_start, 'America/New_York')) AS d,
round(argMin(toFloat64(open), window_start), 2) AS open_px,
round(argMax(toFloat64(close), window_start), 2) AS close_px
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= today() - 75
AND (toHour(toTimeZone(window_start, 'America/New_York')) * 60 + toMinute(toTimeZone(window_start, 'America/New_York'))) BETWEEN 570 AND 959
GROUP BY d
),
paired AS (
SELECT d,
open_px,
lagInFrame(d) OVER (ORDER BY d) AS prev_d,
lagInFrame(close_px) OVER (ORDER BY d) AS prev_close
FROM daily
)
SELECT concat(formatDateTime(prev_d, '%a '), toString(prev_d)) AS last_session_before,
concat(formatDateTime(d, '%a '), toString(d)) AS reopening_session,
dateDiff('day', prev_d, d) AS days_dark,
toString(prev_close) AS close_before_break,
toString(open_px) AS reopening_print,
round((open_px - prev_close) / prev_close * 100, 2) AS gap_pct
FROM paired
WHERE prev_close > 0 AND dateDiff('day', prev_d, d) >= 3
ORDER BY d
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