SPYPOCT 21Open interest change
Open interest in SPY puts expiring Oct 21 (2 weeks out) rose 8,132 at the Oct 8 settlement
1,742 to 9,874 contracts between the Oct 7 and Oct 8 settlements, 467% of the prior figure.
SPY · PUTS · JAN 15 '27Settled
SPY puts expiring Jan 15, 2027 traded 2.7x the calls on that date
As of , published from Oct 8, 2026, 16:12 ET. Source: Schwab options chain.
26,908 put and 10,129 call contracts by 15:57 ET on Oct 8, 2026. Est. premium $33.9M puts, $15.0M calls. Tracked: up to 40 strikes around the money across 33 expirations.
Evidence
| Measure | Value |
|---|---|
| Call volume (contracts) | 10,129 |
| Put volume (contracts) | 26,908 |
| Call open interest, prior settlement | 278,822 |
| Put open interest, prior settlement | 263,128 |
| Call premium, est. (USD) | $15.0M |
| Put premium, est. (USD) | $33.9M |
| Put/call volume ratio | 2.7x |
| Days to expiry | 99 |
Why it fired
- Rule
- put/call volume >= 2.5 (absolute: baseline n 0 < 5); put volume >= 2000; call volume >= 500; expiry >= 1% of ticker volume
- Values that cleared it
- Put volume (contracts): 26,908; Ratio: 2.66
- Contracts traded behind each figure
- Calls: 38; Puts: 30
- Baseline
- median put/call volume ratio, contracts more than 3 months out: not set yet
- Baseline window
- last 20 sessions
- Baseline n
- 0, so the fixed threshold applied
- Claim level
- 1, arithmetic on reported figures
Last-trade position, raw counts
Count of contracts whose single last trade sat near the ask or bid. Not the side of the session's volume. It is not used in the headline.
| Side of chain | Near ask | Near bid | Other |
|---|---|---|---|
| Calls | 1 | 24 | 13 |
| Puts | 11 | 1 | 18 |
What happened next
- Next settlement: Open interest in SPY puts expiring Jan 15 rose 2,597 at the Oct 8 settlement, to 926,869.
- Expiry, Jan 15, 2027: Pending expiry.
More SPY snapshots, Oct 8, 2026
All SPY snapshots on the hub- SPYCOCT 21Open interest change
Open interest in SPY calls expiring Oct 21 (2 weeks out) rose 5,673 at the Oct 8 settlement
1,859 to 7,532 contracts between the Oct 7 and Oct 8 settlements, 305% of the prior figure.
- SPYC776OCT 9Volume vs open interest
SPY 776 calls expiring Oct 9 traded 27.6x their open interest
SPY calls expiring that date in the strikes we track traded 2.6x their open interest, by 15:57 ET on Oct 8, 2026. Tracked: up to 40 strikes around the money across 33 expirations.
- SPYCOCT 14Put/call by expiry
SPY calls outnumbered puts 3.4 to 1 in contracts expiring Oct 14
134,667 call and 39,330 put contracts by 15:57 ET on Oct 8, 2026. Est. premium $14.7M calls, $12.9M puts. Tracked: up to 40 strikes around the money across 33 expirations.