SPX · PUTS · OCT 8Settled
Open interest in SPX puts expiring Oct 8 rose 87,589 at the Oct 7 settlement
As of . Source: Cboe settlement open interest archive.
120,582 to 208,171 contracts between the Oct 6 and Oct 7 settlements, 73% of the prior figure.
Before120,582
After208,171
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 | 120,582 |
|---|
| Open interest, later settlement | 208,171 |
|---|
| Change (contracts) | +87,589 |
|---|
| Change as a share of the earlier figure | 73% |
|---|
| Earlier settlement | Oct 6, 2026 |
|---|
| Later settlement | Oct 7, 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: 87,589; Change as a share of the earlier figure: 0.7264
- Contracts traded behind each figure
- Open interest changed: 184
- Baseline
- median absolute open interest change share, contracts within a week: 0.2211
- Baseline window
- last 20 sessions
- Baseline n
- 18
- 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.
SPXCOCT 14Open interest change
25,099 to 50,597 contracts between the Oct 6 and Oct 7 settlements, 102% of the prior figure.