Every quarter-opening session since 2004: SPY's open-to-close move, with July 1 ranked inside it
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 2026-07-26, from Market Recap: July 1, 2026, The Day in Numbers.
quarter opens measured
91
median quarter open pct
0.01
quarter opens green
46
quarter opens red
45
jul1 oc pct
0.09
jul1 rank worst to best
50
worst quarter open pct
-2.28
best quarter open pct
3.18
first measured
January 2004
- Rows × columns
- 1 × 9
- 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 |
|---|---|---|---|
quarter_opens_measured |
number | every row is 91 | |
median_quarter_open_pct |
number | every row is 0.01 | percent |
quarter_opens_green |
number | every row is 46 | |
quarter_opens_red |
number | every row is 45 | |
jul1_oc_pct |
number | every row is 0.09 | percent |
jul1_rank_worst_to_best |
number | every row is 50 | |
worst_quarter_open_pct |
number | every row is -2.28 | percent |
best_quarter_open_pct |
number | every row is 3.18 | percent |
first_measured |
text | 1 distinct value (January 2004) |
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
SELECT
count() AS quarter_opens_measured,
round(quantileExact(0.5)(oc_pct), 2) AS median_quarter_open_pct,
countIf(oc_pct > 0) AS quarter_opens_green,
countIf(oc_pct <= 0) AS quarter_opens_red,
round(anyIf(oc_pct, first_day = toDate('2026-07-01')), 2) AS jul1_oc_pct,
arrayCount(x -> x < anyIf(oc_pct, first_day = toDate('2026-07-01')), groupArrayIf(oc_pct, first_day != toDate('2026-07-01'))) + 1 AS jul1_rank_worst_to_best,
round(min(oc_pct), 2) AS worst_quarter_open_pct,
round(max(oc_pct), 2) AS best_quarter_open_pct,
concat(monthName(min(first_day)), ' ', toString(toYear(min(first_day)))) AS first_measured
FROM (
SELECT f.first_day AS first_day, d.oc_pct AS oc_pct
FROM (
SELECT toStartOfQuarter(d) AS q, min(d) AS first_day
FROM (
SELECT toDate(toTimeZone(window_start, 'America/New_York')) AS d
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= toDateTime('2004-01-01 00:00:00')
AND window_start < toDateTime('2026-07-02 00:00:00')
AND (toHour(window_start) * 60 + toMinute(window_start)) BETWEEN 810 AND 1199
GROUP BY d
)
GROUP BY q
) f
INNER JOIN (
SELECT toDate(toTimeZone(window_start, 'America/New_York')) AS d,
(argMax(toFloat64(close), (window_start, close)) / argMin(toFloat64(open), (window_start, open)) - 1) * 100 AS oc_pct
FROM global_markets.delayed_stocks_minute_aggs
WHERE ticker = 'SPY'
AND window_start >= toDateTime('2004-01-01 00:00:00')
AND window_start < toDateTime('2026-07-02 00:00:00')
AND (toHour(window_start) * 60 + toMinute(window_start)) BETWEEN 810 AND 1199
GROUP BY d
) d ON d.d = f.first_day
)
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