Daily open-to-close gap versus SPY, in basis points, July to December 2025
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 2026-10-16, from Tax-Loss Harvesting Deadlines: The Real Dates.
| ticker | median_gap_bps | max_gap_bps |
|---|---|---|
| VOO | 0.8 | 6.7 |
| IVV | 0.8 | 4 |
| QQQ | 16.6 | 121.4 |
| RSP | 27.9 | 120.8 |
- Rows × columns
- 4 × 3
- 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 | 4 distinct values (IVV, QQQ, RSP…) | |
median_gap_bps |
number | 0.8 to 27.9 | |
max_gap_bps |
number | 4 to 121.4 |
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.
WITH moves AS
(
SELECT
ticker,
date,
toFloat64(close) / toFloat64(open) - 1 AS pct_move
FROM global_markets.stocks_daily_aggs
WHERE ticker IN ('SPY', 'IVV', 'VOO', 'RSP', 'QQQ')
AND date >= '2025-07-01'
AND date <= '2025-12-31'
AND open > 0
)
SELECT
f.ticker AS ticker,
round(quantileDeterministic(0.5)(abs(f.pct_move - b.spy_move) * 10000, toUInt64(f.date)), 1) AS median_gap_bps,
round(max(abs(f.pct_move - b.spy_move)) * 10000, 1) AS max_gap_bps
FROM moves AS f
INNER JOIN
(
SELECT date, pct_move AS spy_move
FROM moves
WHERE ticker = 'SPY'
) AS b USING (date)
WHERE f.ticker != 'SPY'
GROUP BY f.ticker
ORDER BY median_gap_bps
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