EWZ · PUTS · OCT 23Settled

Open interest in EWZ puts expiring Oct 23 (2 weeks out) rose 23,266 at the Oct 9 settlement

As of Oct 9, 2026 settlement. Source: Cboe settlement open interest archive.

81,113 to 104,379 contracts between the Oct 8 and Oct 9 settlements, 29% of the prior figure.

Evidence

The numbers behind this snapshot, Oct 9, 2026 settlement. Open interest change, not trades; it does not say which side opened or closed.
Measure	Value
Open interest, earlier settlement	81,113
Open interest, later settlement	104,379
Change (contracts)	+23,266
Change as a share of the earlier figure	29%
Earlier settlement	Oct 8, 2026
Later settlement	Oct 9, 2026
Days to expiry	14

Rule: |change| >= 10000 or (>= 2000 and >= 50% of prior) (absolute: baseline n 2 < 5); prior OI >= 1000
Values that cleared it: Change: 23,266; Change as a share of the earlier figure: 0.2868
Contracts traded behind each figure: Open interest changed: 18
Baseline: median absolute open interest change share, contracts 1 to 3 weeks out: 0.0461
Baseline window: last 20 sessions
Baseline n: 2, so the fixed threshold applied
Claim level: 0, a reported fact

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

EWZCJAN 15 '27Open interest change
Settled
Open interest in EWZ calls expiring Jan 15, 2027 rose 301,915 at the Oct 9 settlement
584,724 to 886,639 contracts between the Oct 8 and Oct 9 settlements, 52% of the prior figure.
Source: Cboe settlement open interest archiveEWZ page Details