SPYCNOV 4Open interest change
Open interest in SPY calls expiring Nov 4 (2 weeks out) rose 2,582 at the Oct 22 settlement
1,195 to 3,777 contracts between the Oct 21 and Oct 22 settlements, 216% of the prior figure.
SPY · PUTS · OCT 26Settled
Open interest in SPY puts expiring Oct 26 rose 170,614 at the Oct 22 settlement
As of . Source: Cboe settlement open interest archive.
On the page at squawkflow.com/options-flow/2026-10-22/spy-puts-oct-26-2026-open-interest-change: the evidence table and the rule this settlement figure passed; and up to six other SPY snapshots from Oct 22, 2026.
127,468 to 298,082 contracts between the Oct 21 and Oct 22 settlements, 134% of the prior figure.
Evidence
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 127,468 |
| Open interest, later settlement | 298,082 |
| Change (contracts) | +170,614 |
| Change as a share of the earlier figure | 134% |
| Earlier settlement | Oct 21, 2026 |
| Later settlement | Oct 22, 2026 |
| Days to expiry | 4 |
Why it fired
- Rule
- |change| >= 10000 or (>= 2000 and >= 50% of prior), and |change share| >= 2.0 x bucket median; prior OI >= 1000
- Values that cleared it
- Change: 170,614; Change as a share of the earlier figure: 1.3385
- Contracts traded behind each figure
- Open interest changed: 85
- Baseline
- median absolute open interest change share, contracts within a week: 0.3101
- Baseline window
- last 20 sessions
- Baseline n
- 20
- Claim level
- 0, a reported fact
What happened next
This snapshot is itself a settlement figure, so it has no follow-up of its own.
More SPY snapshots, Oct 22, 2026
All SPY snapshots on the hub- SPYPOCT 26Put/call by expiry
SPY puts expiring Oct 26 traded 2.5x the calls, vs a 1.2x median
The median is SPY's put/call volume ratio for contracts within a week over the last 10 sessions. 348,105 put and 140,572 call contracts by 16:13 ET on Oct 22, 2026. Tracked: listed strikes in the 2 nearest expirations.
- SPYCMAR 19 '27Put/call by expiry
SPY calls outnumbered puts 14.5 to 1 expiring Mar 19, 2027, vs a 1.0 median
The median is SPY's call/put volume ratio for contracts more than 3 months out over the last 10 sessions. 12,112 call and 834 put contracts by 09:47 ET on Oct 22, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
- SPYPNOV 20Put/call by expiry
SPY puts expiring Nov 20 traded 3.5x the calls, vs a 1.3x median
The median is SPY's put/call volume ratio for contracts 1 to 3 months out over the last 10 sessions. 3,538 put and 1,008 call contracts by 09:37 ET on Oct 22, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
- SPYC767OCT 22Volume vs open interest
SPY 767 calls expiring Oct 22 (same day) traded 7.6x their open interest
SPY calls expiring that date in the strikes we track traded 0.6x their open interest, by 09:32 ET on Oct 22, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
- SPYCOCT 22Put/call by expiry
SPY calls outnumbered puts 2.1 to 1 expiring Oct 22 (same day), vs a 1.0 median
The median is SPY's call/put volume ratio for contracts same day over the last 9 sessions. 85,074 call and 41,094 put contracts by 09:32 ET on Oct 22, 2026. Tracked: up to 40 strikes around the money across 34 expirations.