# Biggest options open interest changes OI settled 2026-09-23 vs 2026-09-22. > Open interest change, not trades; it does not say which side opened or closed. Source: SquawkFlow's own nightly archive of Cboe settled open interest. Updates once per session. Figures are contracts, not dollars: the archive holds no option prices. 126 of 212 archived US symbols compared. The other 86 lacked a consecutive settlement pair in the archive for these two sessions. 126 of those compared reported an identical book in both sessions. Across the compared symbols: 0 contracts changed open interest, 0 added, 0 removed, net 0 contracts. ## Largest open interest increases (contracts) None in this pair. ## Largest open interest decreases (contracts) None in this pair. ## Index ETFs (SPY, QQQ, IWM, DIA) Increases: None in this pair. Decreases: None in this pair. ## Single stocks Increases: None in this pair. Decreases: None in this pair. ## Calls vs puts | Type | Added | Removed | Net | |---|---|---|---| | Calls | 0 | 0 | 0 | | Puts | 0 | 0 | 0 | ## Biggest percent changes Percent changes only for contracts with at least 1,000 prior open interest. Increases: None in this pair. Decreases: None in this pair. ## Top strikes, summed across expirations None in this pair. ## Symbols by net change Largest net increases: None in this pair. Largest net decreases: None in this pair. ## Archive - https://squawkflow.com/oi-changes/2026-10-08.md (2026-10-08 vs 2026-10-07, 158 symbols) - https://squawkflow.com/oi-changes/2026-10-07.md (2026-10-07 vs 2026-10-06, 135 symbols) - https://squawkflow.com/oi-changes/2026-10-06.md (2026-10-06 vs 2026-10-05, 136 symbols) - https://squawkflow.com/oi-changes/2026-10-05.md (2026-10-05 vs 2026-10-02, 155 symbols) - https://squawkflow.com/oi-changes/2026-10-02.md (2026-10-02 vs 2026-10-01, 148 symbols) - https://squawkflow.com/oi-changes/2026-10-01.md (2026-10-01 vs 2026-09-30, 156 symbols) - https://squawkflow.com/oi-changes/2026-09-30.md (2026-09-30 vs 2026-09-29, 148 symbols) - https://squawkflow.com/oi-changes/2026-09-29.md (2026-09-29 vs 2026-09-28, 150 symbols) - https://squawkflow.com/oi-changes/2026-09-28.md (2026-09-28 vs 2026-09-25, 150 symbols) - https://squawkflow.com/oi-changes/2026-09-25.md (2026-09-25 vs 2026-09-24, 135 symbols) SPX open interest change by strike: https://squawkflow.com/oi-change.md Canonical: https://squawkflow.com/oi-changes/2026-09-23