QQQPOCT 22Open interest change
Open interest in QQQ puts expiring Oct 22 rose 123,778 at the Oct 21 settlement
113,328 to 237,106 contracts between the Oct 20 and Oct 21 settlements, 109% of the prior figure.
QQQ · PUTS · NOV 3Settled
Open interest in QQQ puts expiring Nov 3 (2 weeks out) rose 4,371 at the Oct 21 settlement
As of . Source: Cboe settlement open interest archive.
On the page at squawkflow.com/options-flow/2026-10-21/qqq-puts-nov-3-2026-open-interest-change: the evidence table and the rule this settlement figure passed; and up to six other QQQ snapshots from Oct 21, 2026.
2,631 to 7,002 contracts between the Oct 20 and Oct 21 settlements, 166% of the prior figure.
Evidence
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 2,631 |
| Open interest, later settlement | 7,002 |
| Change (contracts) | +4,371 |
| Change as a share of the earlier figure | 166% |
| Earlier settlement | Oct 20, 2026 |
| Later settlement | Oct 21, 2026 |
| Days to expiry | 13 |
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: 4,371; Change as a share of the earlier figure: 1.6613
- Contracts traded behind each figure
- Open interest changed: 74
- Baseline
- median absolute open interest change share, contracts 1 to 3 weeks out: 0.2968
- 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.
More QQQ snapshots, Oct 21, 2026
All QQQ snapshots on the hub- QQQCOCT 26Put/call by expiry
QQQ calls outnumbered puts 1.8 to 1 expiring Oct 26, vs a 0.9 median
The median is QQQ's call/put volume ratio for contracts within a week over the last 9 sessions. 14,160 call and 7,759 put contracts by 10:34 ET on Oct 21, 2026. Tracked: up to 40 strikes around the money across 31 expirations.
- QQQCOCT 30Put/call by expiry
QQQ calls outnumbered puts 1.6 to 1 expiring Oct 30 (1 week out), vs a 0.8 median
The median is QQQ's call/put volume ratio for contracts 1 to 3 weeks out over the last 9 sessions. 9,267 call and 5,844 put contracts by 10:04 ET on Oct 21, 2026. Tracked: up to 40 strikes around the money across 31 expirations.
- QQQPNOV 20Put/call by expiry
QQQ puts expiring Nov 20 traded 6.8x the calls, vs a 1.2x median
The median is QQQ's put/call volume ratio for contracts 1 to 3 months out over the last 9 sessions. 3,519 put and 518 call contracts by 09:34 ET on Oct 21, 2026. Tracked: up to 40 strikes around the money across 31 expirations.
- QQQP722OCT 21Volume vs open interest
QQQ 722 puts expiring Oct 21 (same day) traded 5.8x their open interest
QQQ puts expiring that date in the strikes we track traded 0.8x their open interest, by 09:34 ET on Oct 21, 2026. Tracked: up to 40 strikes around the money across 31 expirations.
- QQQCOCT 23Put/call by expiry
QQQ calls outnumbered puts 2.1 to 1 expiring Oct 23, vs a 0.9 median
The median is QQQ's call/put volume ratio for contracts within a week over the last 9 sessions. 8,313 call and 3,868 put contracts by 09:34 ET on Oct 21, 2026. Tracked: up to 40 strikes around the money across 31 expirations.