OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

PSX $220.00 Put

PSX270115P00220000

Latest saved OI239Oct 23, 2026
Last change-6vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PSX $220.00 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2681340 2026-10-02: 267 OI2026-10-05: 268 OI2026-10-06: 268 OI2026-10-07: 268 OI2026-10-08: 268 OI2026-10-09: 268 OI2026-10-13: 245 OI2026-10-14: 245 OI2026-10-15: 244 OI2026-10-16: 245 OI2026-10-21: 245 OI2026-10-23: 239 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

PSX contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing239-6
Oct 21, 20262450
Oct 16, 2026245+1
Oct 15, 2026244-1
Oct 14, 20262450
Oct 13, 2026245-23
Oct 09, 20262680
Oct 08, 20262680
Oct 07, 20262680
Oct 06, 20262680
Oct 05, 2026268+1
Oct 02, 2026267No prior observation