SPX · CALLS · OCT 29Settled
Open interest in SPX calls expiring Oct 29 rose 88,504 at the Oct 28 settlement
As of . Source: settlement open interest archive.
On the page at squawkflow.com/options-flow/2026-10-28/spx-calls-oct-29-2026-open-interest-change: the evidence table and the rule this settlement figure passed; and up to six other SPX snapshots from Oct 28, 2026.
50,718 to 139,222 contracts between the Oct 27 and Oct 28 settlements, 175% of the prior figure.
Evidence
The numbers behind this snapshot, Oct 28, 2026 settlement. Open interest change, not trades; it does not say which side opened or closed.| Measure | Value |
|---|
| Open interest, earlier settlement | 50,718 |
|---|
| Open interest, later settlement | 139,222 |
|---|
| Change (contracts) | +88,504 |
|---|
| Change as a share of the earlier figure | 175% |
|---|
| Earlier settlement | Oct 27, 2026 |
|---|
| Later settlement | Oct 28, 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: 88,504; Change as a share of the earlier figure: 1.745
- Contracts traded behind each figure
- Open interest changed: 123
- Baseline
- median absolute open interest change share, contracts within a week: 0.1815
- 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.
SPXCNOV 24Open interest change
3,158 to 8,778 contracts between the Oct 27 and Oct 28 settlements, 178% of the prior figure.