IWMCOCT 19Open interest change
Open interest in IWM calls expiring Oct 19 rose 8,975 at the Oct 15 settlement
15,971 to 24,946 contracts between the Oct 14 and Oct 15 settlements, 56% of the prior figure.
IWM · 272 · CALLS · OCT 15Expired
IWM 272 calls expiring Oct 15 (same day) traded 5.2x their open interest
As of , published from Oct 15, 2026, 10:06 ET. The evidence table and the rule that fired are at squawkflow.com/options-flow/2026-10-15/iwm-272-calls-oct-15-2026-volume-vs-open-interest, with the follow-up recorded at Oct 16, 2026, 08:30 ET. Source: Schwab options chain.
IWM calls expiring that date in the strikes we track traded 1.4x their open interest, by 09:51 ET on Oct 15, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
Evidence
| Measure | Value |
|---|---|
| Volume / prior open interest, this strike | 5.2x |
| Volume / prior open interest, the expiry's tracked strikes | 1.4x |
| Days to expiry | 0 |
Why it fired
- Rule
- volume/prior OI >= 5.0 and >= 3.0 x this expiry's call volume/OI; prior OI >= 1000; volume >= 2000
- Values that cleared it
- Expiry ratio: 1.45; Ratio: 5.18
- Contracts traded behind each figure
- Expiry calls: 25
- Baseline
- this expiry's call volume/open interest, same session: 1.45
- Baseline window
- same expiry, same session (n = strikes with open interest)
- Baseline n
- 25
- Claim level
- 1, arithmetic on reported figures
What happened next
- Next settlement: Pending the next settlement.
- Expiry, Oct 15, 2026: Expired Oct 15. IWM was 275.08 at the Oct 15 settlement capture; the 272 calls finished in the money by 3.08.
More IWM snapshots, Oct 15, 2026
All IWM snapshots on the hub- IWMPJUN 17 '27Put/call by expiry
IWM puts expiring Jun 17, 2027 traded 3.4x the calls, vs a 1.1x median
The median is IWM's put/call volume ratio for contracts more than 3 months out over the last 5 sessions. 9,902 put and 2,936 call contracts by 15:56 ET on Oct 15, 2026. Tracked: up to 40 strikes around the money across 33 expirations.
- IWMPJAN 15 '27Put/call by expiry
IWM puts expiring Jan 15, 2027 traded 5.6x the calls, vs a 3.0x median
The median is IWM's put/call volume ratio for contracts 1 to 3 months out over the last 5 sessions. 10,771 put and 1,917 call contracts by 10:11 ET on Oct 15, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
- IWMCOCT 23Put/call by expiry
IWM calls outnumbered puts 1.5 to 1 expiring Oct 23 (1 week out), vs a 0.5 median
The median is IWM's call/put volume ratio for contracts 1 to 3 weeks out over the last 5 sessions. 5,141 call and 3,367 put contracts by 10:11 ET on Oct 15, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
- IWMPOCT 16Put/call by expiry
IWM puts expiring Oct 16 traded 1.6x the calls, vs a 0.7x median
The median is IWM's put/call volume ratio for contracts within a week over the last 5 sessions. 40,018 put and 25,377 call contracts by 10:01 ET on Oct 15, 2026. Tracked: up to 40 strikes around the money across 34 expirations.
- IWMCNOV 13Put/call by expiry
IWM calls outnumbered puts 4.2 to 1 expiring Nov 13, vs a 0.3 median
The median is IWM's call/put volume ratio for contracts 1 to 3 months out over the last 5 sessions. 2,166 call and 517 put contracts by 09:56 ET on Oct 15, 2026. Tracked: up to 40 strikes around the money across 34 expirations.