SPX · PUTS · OCT 15Settled
Open interest in SPX puts expiring Oct 15 rose 165,535 at the Oct 14 settlement
As of . The evidence table and the rule this settlement figure passed are at squawkflow.com/options-flow/2026-10-14/spx-puts-oct-15-2026-open-interest-change. Source: Cboe settlement open interest archive.
95,131 to 260,666 contracts between the Oct 13 and Oct 14 settlements, 174% of the prior figure.
Evidence
The numbers behind this snapshot, Oct 14, 2026 settlement. Open interest change, not trades; it does not say which side opened or closed.| Measure | Value |
|---|
| Open interest, earlier settlement | 95,131 |
|---|
| Open interest, later settlement | 260,666 |
|---|
| Change (contracts) | +165,535 |
|---|
| Change as a share of the earlier figure | 174% |
|---|
| Earlier settlement | Oct 13, 2026 |
|---|
| Later settlement | Oct 14, 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: 165,535; Change as a share of the earlier figure: 1.7401
- Contracts traded behind each figure
- Open interest changed: 186
- Baseline
- median absolute open interest change share, contracts within a week: 0.2097
- 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.
SPXCOCT 15Open interest change
48,887 to 114,412 contracts between the Oct 13 and Oct 14 settlements, 134% of the prior figure.