SPX · CALLS · OCT 28Settled
Open interest in SPX calls expiring Oct 28 rose 89,191 at the Oct 27 settlement
As of . Source: settlement open interest archive.
On the page at squawkflow.com/options-flow/2026-10-27/spx-calls-oct-28-2026-open-interest-change: the evidence table and the rule this settlement figure passed; and up to six other SPX snapshots from Oct 27, 2026.
65,522 to 154,713 contracts between the Oct 26 and Oct 27 settlements, 136% of the prior figure.
Evidence
The numbers behind this snapshot, Oct 27, 2026 settlement. Open interest change, not trades; it does not say which side opened or closed.| Measure | Value |
|---|
| Open interest, earlier settlement | 65,522 |
|---|
| Open interest, later settlement | 154,713 |
|---|
| Change (contracts) | +89,191 |
|---|
| Change as a share of the earlier figure | 136% |
|---|
| Earlier settlement | Oct 26, 2026 |
|---|
| Later settlement | Oct 27, 2026 |
|---|
| Days to expiry | 1 |
|---|
Why it fired
- 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: 89,191; Change as a share of the earlier figure: 1.3612
- Contracts traded behind each figure
- Open interest changed: 129
- Baseline
- median absolute open interest change share, contracts within a week: 0.1878
- Baseline window
- last 20 sessions
- Baseline n
- 20
- Claim level
- 0, a reported fact
What happened next
This snapshot is itself a settlement figure, so it has no follow-up of its own.
SPXPDEC 11Open interest change
13,817 to 138,607 contracts between the Oct 26 and Oct 27 settlements, 903% of the prior figure.