IWMCOCT 14Open interest change
Open interest in IWM calls expiring Oct 14 rose 39,262 at the Oct 12 settlement
15,115 to 54,377 contracts between the Oct 9 and Oct 12 settlements, 260% of the prior figure.
IWM · CALLS · OCT 13Settled
Open interest in IWM calls expiring Oct 13 rose 19,269 at the Oct 12 settlement
As of . Source: Cboe settlement open interest archive.
21,828 to 41,097 contracts between the Oct 9 and Oct 12 settlements, 88% of the prior figure.
Evidence
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 21,828 |
| Open interest, later settlement | 41,097 |
| Change (contracts) | +19,269 |
| Change as a share of the earlier figure | 88% |
| Earlier settlement | Oct 9, 2026 |
| Later settlement | Oct 12, 2026 |
| Days to expiry | 1 |
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: 19,269; Change as a share of the earlier figure: 0.8828
- Contracts traded behind each figure
- Open interest changed: 22
- Baseline
- median absolute open interest change share, contracts within a week: 0.2515
- 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 IWM snapshots, Oct 12, 2026
All IWM snapshots on the hub- IWMOCT 14Premium concentration
IWM options expiring Oct 14 drew 44% of tracked IWM est. premium on Oct 12
$3.9M est. of $8.9M est. across the IWM strikes we track, by 16:11 ET. Calls $2.2M, puts $1.7M. Tracked: listed strikes in the 2 nearest expirations.
- IWMPDEC 18Put/call by expiry
IWM puts expiring Dec 18 traded 3.5x the calls on that date
7,215 put and 2,088 call contracts by 14:51 ET on Oct 12, 2026. Est. premium $3.3M puts, $1.6M calls. Tracked: up to 40 strikes around the money across 34 expirations.
- IWMCNOV 6Put/call by expiry
IWM calls outnumbered puts 6.2 to 1 in contracts expiring Nov 6
4,273 call and 692 put contracts by 10:41 ET on Oct 12, 2026. Est. premium $1.2M calls, $205K puts. Tracked: up to 40 strikes around the money across 34 expirations.
- IWMCJAN 15 '27Put/call by expiry
IWM calls outnumbered puts 4.1 to 1 in contracts expiring Jan 15, 2027
4,513 call and 1,102 put contracts by 10:10 ET on Oct 12, 2026. Est. premium $2.6M calls, $1.2M puts. Tracked: up to 40 strikes around the money across 34 expirations.
- IWMNear vs far dates
IWM put/call volume ratio held at 0.79 within 3 weeks, against 0.25 1 to 3 months out
Within 3 weeks: 77,617 put and 98,001 call contracts. 1 to 3 months out: 1,048 put and 4,161 call contracts. By 09:56 ET on Oct 12, 2026. Tracked: up to 40 strikes around the money across 34 expirations.