SPX · CALLS · OCT 26Settled

Open interest in SPX calls expiring Oct 26 rose 56,587 at the Oct 23 settlement

As of Oct 23, 2026 settlement. Source: settlement open interest archive.

On the page at squawkflow.com/options-flow/2026-10-23/spx-calls-oct-26-2026-open-interest-change: the evidence table and the rule this settlement figure passed; and up to six other SPX snapshots from Oct 23, 2026.

53,563 to 110,150 contracts between the Oct 22 and Oct 23 settlements, 106% of the prior figure.

Evidence

The numbers behind this snapshot, Oct 23, 2026 settlement. Open interest change, not trades; it does not say which side opened or closed.
Measure	Value
Open interest, earlier settlement	53,563
Open interest, later settlement	110,150
Change (contracts)	+56,587
Change as a share of the earlier figure	106%
Earlier settlement	Oct 22, 2026
Later settlement	Oct 23, 2026
Days to expiry	3

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: 56,587; Change as a share of the earlier figure: 1.0565
Contracts traded behind each figure: Open interest changed: 136
Baseline: median absolute open interest change share, contracts within a week: 0.1861
Baseline window: last 20 sessions
Baseline n: 20
Claim level: 0, a reported fact

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

SPXPOCT 26Open interest change
Settled
Open interest in SPX puts expiring Oct 26 rose 158,746 at the Oct 23 settlement
128,041 to 286,787 contracts between the Oct 22 and Oct 23 settlements, 124% of the prior figure.
Source: settlement open interest archiveDetails