EWZCOCT 23Open interest change
Open interest in EWZ calls expiring Oct 23 rose 20,063 at the Oct 21 settlement
85,952 to 106,015 contracts between the Oct 20 and Oct 21 settlements, 23% of the prior figure.
EWZ · CALLS · OCT 30Settled
Open interest in EWZ calls expiring Oct 30 (1 week out) rose 85,007 at the Oct 21 settlement
As of . Source: Cboe settlement open interest archive.
On the page at squawkflow.com/options-flow/2026-10-21/ewz-calls-oct-30-2026-open-interest-change: the evidence table and the rule this settlement figure passed; and up to six other EWZ snapshots from Oct 21, 2026.
383,939 to 468,946 contracts between the Oct 20 and Oct 21 settlements, 22% of the prior figure.
Evidence
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 383,939 |
| Open interest, later settlement | 468,946 |
| Change (contracts) | +85,007 |
| Change as a share of the earlier figure | 22% |
| Earlier settlement | Oct 20, 2026 |
| Later settlement | Oct 21, 2026 |
| Days to expiry | 9 |
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: 85,007; Change as a share of the earlier figure: 0.2214
- Contracts traded behind each figure
- Open interest changed: 30
- Baseline
- median absolute open interest change share, contracts 1 to 3 weeks out: 0.0917
- Baseline window
- last 20 sessions
- Baseline n
- 8
- 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.