IWM · PUTS · OCT 14Settled

Open interest in IWM puts expiring Oct 14 (1 week out) rose 31,460 at the Oct 7 settlement

As of Oct 7, 2026 settlement. Source: Cboe settlement open interest archive.

3,820 to 35,280 contracts between the Oct 6 and Oct 7 settlements, 824% of the prior figure.

Evidence

The numbers behind this snapshot, Oct 7, 2026 settlement. Open interest change, not trades; it does not say which side opened or closed.
Measure	Value
Open interest, earlier settlement	3,820
Open interest, later settlement	35,280
Change (contracts)	+31,460
Change as a share of the earlier figure	824%
Earlier settlement	Oct 6, 2026
Later settlement	Oct 7, 2026
Days to expiry	7

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: 31,460; Change as a share of the earlier figure: 8.2356
Contracts traded behind each figure: Open interest changed: 36
Baseline: median absolute open interest change share, contracts 1 to 3 weeks out: 0.1478
Baseline window: last 20 sessions
Baseline n: 18
Claim level: 0, a reported fact

This snapshot is itself a settlement figure, so it has no follow-up of its own.

IWMPOCT 15Open interest change
Settled
Open interest in IWM puts expiring Oct 15 (1 week out) rose 22,457 at the Oct 7 settlement
4,956 to 27,413 contracts between the Oct 6 and Oct 7 settlements, 453% of the prior figure.
Source: Cboe settlement open interest archiveIWM page Details