SPCXCOCT 21Open interest change
Open interest in SPCX calls expiring Oct 21 rose 44,896 at the Oct 20 settlement
50,719 to 95,615 contracts between the Oct 19 and Oct 20 settlements, 89% of the prior figure.
SPCX · PUTS · OCT 21Settled
Open interest in SPCX puts expiring Oct 21 rose 62,639 at the Oct 20 settlement
As of . Source: Cboe settlement open interest archive.
On the page at squawkflow.com/options-flow/2026-10-20/spcx-puts-oct-21-2026-open-interest-change: the evidence table and the rule this settlement figure passed; and up to six other SPCX snapshots from Oct 20, 2026.
40,595 to 103,234 contracts between the Oct 19 and Oct 20 settlements, 154% of the prior figure.
Evidence
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 40,595 |
| Open interest, later settlement | 103,234 |
| Change (contracts) | +62,639 |
| Change as a share of the earlier figure | 154% |
| Earlier settlement | Oct 19, 2026 |
| Later settlement | Oct 20, 2026 |
| Days to expiry | 1 |
Why it fired
- Rule
- |change| >= 10000 or (>= 2000 and >= 50% of prior) (absolute: baseline n 3 < 5); prior OI >= 1000
- Values that cleared it
- Change: 62,639; Change as a share of the earlier figure: 1.543
- Contracts traded behind each figure
- Open interest changed: 45
- Baseline
- median absolute open interest change share, contracts within a week: 0.384
- Baseline window
- last 20 sessions
- Baseline n
- 3, so the fixed threshold applied
- 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.