SPX · CALLS · OCT 14Settled

Open interest in SPX calls expiring Oct 14 (1 week out) rose 25,498 at the Oct 7 settlement

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

25,099 to 50,597 contracts between the Oct 6 and Oct 7 settlements, 102% 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	25,099
Open interest, later settlement	50,597
Change (contracts)	+25,498
Change as a share of the earlier figure	102%
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: 25,498; Change as a share of the earlier figure: 1.0159
Contracts traded behind each figure: Open interest changed: 88
Baseline: median absolute open interest change share, contracts 1 to 3 weeks out: 0.0837
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.

SPXPOCT 8Open interest change
Settled
Open interest in SPX puts expiring Oct 8 rose 87,589 at the Oct 7 settlement
120,582 to 208,171 contracts between the Oct 6 and Oct 7 settlements, 73% of the prior figure.
Source: Cboe settlement open interest archiveDetails