Near-the-money SPY puts (20-45 days to expiry), July 2026: size of the day-over-day close move
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 2026-09-11, from Stop Orders on Options: What Actually Triggers.
| move_bucket | contract_days | share_pct |
|---|---|---|
| under 5% | 396 | 16.7 |
| 5% to 10% | 339 | 14.3 |
| 10% to 20% | 591 | 25 |
| 20% or more | 1039 | 43.9 |
- 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 |
|---|---|---|---|
move_bucket |
text | 4 distinct values (10% to 20%, 20% or more, 5% to 10%…) | |
contract_days |
number | 339 to 1,039 | |
share_pct |
number | 14.3 to 43.9 | 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.
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 daily AS
(
SELECT
ticker,
date,
max(toFloat64(option_close)) AS put_close,
max(toFloat64(underlying_close)) AS spy_close,
max(toFloat64(strike_price)) AS strike,
max(days_to_expiry) AS dte
FROM global_markets.options_greeks
WHERE underlying_symbol = 'SPY'
AND lower(toString(option_type)) IN ('put', 'p')
AND date >= toDate('2026-06-29')
AND date < toDate('2026-08-01')
AND days_to_expiry BETWEEN 15 AND 50
AND volume > 0
GROUP BY ticker, date
),
chained AS
(
SELECT
date,
put_close,
spy_close,
strike,
dte,
lagInFrame(put_close, 1) OVER (PARTITION BY ticker ORDER BY date ASC ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS prev_put,
lagInFrame(date, 1) OVER (PARTITION BY ticker ORDER BY date ASC ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS prev_date
FROM daily
),
moves AS
(
SELECT abs(100 * (put_close / prev_put - 1)) AS move_pct
FROM chained
WHERE prev_put > 0
AND dateDiff('day', prev_date, date) <= 4
AND date >= toDate('2026-07-01')
AND dte BETWEEN 20 AND 45
AND abs(strike / spy_close - 1) < 0.02
)
SELECT
multiIf(move_pct < 5, 'under 5%',
move_pct < 10, '5% to 10%',
move_pct < 20, '10% to 20%',
'20% or more') AS move_bucket,
count() AS contract_days,
round(100 * count() / (SELECT count() FROM moves), 1) AS share_pct
FROM moves
GROUP BY move_bucket
ORDER BY min(move_pct)
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