IWMCOCT 13Open interest change
Open interest in IWM calls expiring Oct 13 rose 6,979 at the Oct 8 settlement
10,189 to 17,168 contracts between the Oct 7 and Oct 8 settlements, 68% of the prior figure.
IWM · PUTS · NOV 13Settled
Open interest in IWM puts expiring Nov 13 rose 5,715 at the Oct 8 settlement
As of . Source: Cboe settlement open interest archive.
8,578 to 14,293 contracts between the Oct 7 and Oct 8 settlements, 67% of the prior figure.
Evidence
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 8,578 |
| Open interest, later settlement | 14,293 |
| Change (contracts) | +5,715 |
| Change as a share of the earlier figure | 67% |
| Earlier settlement | Oct 7, 2026 |
| Later settlement | Oct 8, 2026 |
| Days to expiry | 36 |
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: 5,715; Change as a share of the earlier figure: 0.6662
- Contracts traded behind each figure
- Open interest changed: 52
- Baseline
- median absolute open interest change share, contracts 1 to 3 months out: 0.0525
- Baseline window
- last 20 sessions
- Baseline n
- 19
- 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 IWM snapshots, Oct 8, 2026
All IWM snapshots on the hub- IWMP262NOV 20Volume vs open interest
IWM 262 puts expiring Nov 20 traded 7.0x their open interest
IWM puts expiring that date in the strikes we track traded 0.3x their open interest, by 15:56 ET on Oct 8, 2026. Tracked: up to 40 strikes around the money across 33 expirations.
- IWMPNOV 20Put/call by expiry
IWM puts expiring Nov 20 traded 4.5x the calls on that date
199,289 put and 43,970 call contracts by 15:56 ET on Oct 8, 2026. Est. premium $57.7M puts, $18.2M calls. Tracked: up to 40 strikes around the money across 33 expirations.
- IWMPNOV 6Put/call by expiry
IWM puts expiring Nov 6 traded 2.8x the calls on that date
11,625 put and 4,103 call contracts by 15:56 ET on Oct 8, 2026. Est. premium $3.6M puts, $1.6M calls. Tracked: up to 40 strikes around the money across 33 expirations.
- IWMNear vs far dates
IWM put/call volume ratio held at 1.22 within 3 weeks, against 3.47 1 to 3 months out
Within 3 weeks: 511,253 put and 420,014 call contracts. 1 to 3 months out: 259,486 put and 74,819 call contracts. By 15:56 ET on Oct 8, 2026. Tracked: up to 40 strikes around the money across 33 expirations.