BACPSEP 17 '27Open interest change
Open interest in BAC puts expiring Sep 17, 2027 rose 6,075 at the Oct 8 settlement
11,219 to 17,294 contracts between the Oct 7 and Oct 8 settlements, 54% of the prior figure.
BAC · PUTS · NOV 20Settled
Open interest in BAC puts expiring Nov 20 rose 30,345 at the Oct 8 settlement
As of . Source: Cboe settlement open interest archive.
95,844 to 126,189 contracts between the Oct 7 and Oct 8 settlements, 32% of the prior figure.
Evidence
| Measure | Value |
|---|---|
| Open interest, earlier settlement | 95,844 |
| Open interest, later settlement | 126,189 |
| Change (contracts) | +30,345 |
| Change as a share of the earlier figure | 32% |
| Earlier settlement | Oct 7, 2026 |
| Later settlement | Oct 8, 2026 |
| Days to expiry | 43 |
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: 30,345; Change as a share of the earlier figure: 0.3166
- Contracts traded behind each figure
- Open interest changed: 15
- Baseline
- median absolute open interest change share, contracts 1 to 3 months out: 0.0358
- Baseline window
- last 20 sessions
- Baseline n
- 14
- 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 BAC snapshots, Oct 8, 2026
All BAC snapshots on the hub- BACPNOV 20Put/call by expiry
BAC puts expiring Nov 20 traded 7.7x the calls on that date
64,300 put and 8,323 call contracts by 15:56 ET on Oct 8, 2026. Est. premium $16.6M puts, $1.0M calls. Tracked: up to 40 strikes around the money across 21 expirations.
- BACPJAN 21 '28Put/call by expiry
BAC puts expiring Jan 21, 2028 traded 7.9x the calls on that date
6,134 put and 781 call contracts by 15:56 ET on Oct 8, 2026. Est. premium $3.1M puts, $557K calls. Tracked: up to 40 strikes around the money across 21 expirations.
- BACC53OCT 9Volume vs open interest
BAC 53 calls expiring Oct 9 traded 13.3x their open interest
BAC calls expiring that date in the strikes we track traded 1.0x their open interest, by 15:56 ET on Oct 8, 2026. Tracked: up to 40 strikes around the money across 21 expirations.
- BACNear vs far dates
BAC put/call volume ratio held at 0.47 within 3 weeks, against 3.81 1 to 3 months out
Within 3 weeks: 42,515 put and 91,100 call contracts. 1 to 3 months out: 71,580 put and 18,779 call contracts. By 15:56 ET on Oct 8, 2026. Tracked: up to 40 strikes around the money across 21 expirations.