# Open interest in SPY puts expiring Oct 21 (1 week out) rose 44,462 at the Oct 12 settlement

As of the Oct 12, 2026 settlement: Open interest in SPY puts expiring Oct 21 (1 week out) rose 44,462 at the Oct 12 settlement. 12,809 to 57,271 contracts between the Oct 9 and Oct 12 settlements, 347% of the prior figure. Source: Cboe settlement open interest archive.

- Session: 2026-10-12
- Kind: Open interest change
- Status: Settled
- Expiry: 2026-10-21 (1 to 3 weeks)
- Rule: |change| >= 10000 or (>= 2000 and >= 50% of prior), and |change share| >= 2.0 x bucket median; prior OI >= 1000
- Baseline: median absolute open interest change share, contracts 1 to 3 weeks out, last 20 sessions, n = 20, value 0.3455

| Metric | Value |
|---|---:|
| changeShare | 3.4712 |
| daysToExpiry | 9 |
| openInterest | 57271 |
| openInterestChange | 44462 |
| priorOpenInterest | 12809 |
| priorSettlement | 2026-10-09 |
| settlement | 2026-10-12 |

## What happened next

This snapshot is itself a settlement figure.

Caveat: Open interest change, not trades; it does not say which side opened or closed.

Session page: https://squawkflow.com/options-flow/2026-10-12

## Citation

Source: SquawkFlow, https://squawkflow.com/options-flow/2026-10-12/spy-puts-oct-21-2026-open-interest-change
Retrieved: 2026-10-14 03:46 ET
Attribution: cite the page URL rather than a copied number. Levels are
recomputed every session, so a number without its date is wrong within a day.

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