As of . The evidence table and the rule this settlement figure passed are at squawkflow.com/options-flow/2026-10-15/iwm-calls-oct-19-2026-open-interest-change. Source: Cboe settlement open interest archive.
15,971 to 24,946 contracts between the Oct 14 and Oct 15 settlements, 56% of the prior figure.
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 15,971 |
| Open interest, later settlement | 24,946 |
| Change (contracts) | +8,975 |
| Change as a share of the earlier figure | 56% |
| Earlier settlement | Oct 14, 2026 |
| Later settlement | Oct 15, 2026 |
| Days to expiry | 4 |
This snapshot is itself a settlement figure, so it has no follow-up of its own.
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.
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.
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.
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.
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.
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.