OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

PSX $280.00 Put

PSX261218P00280000

Latest saved OI244Oct 23, 2026
Last change-1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PSX $280.00 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. 2551270 2026-10-02: 10 OI2026-10-05: 10 OI2026-10-06: 25 OI2026-10-07: 25 OI2026-10-08: 25 OI2026-10-09: 138 OI2026-10-13: 207 OI2026-10-14: 207 OI2026-10-15: 250 OI2026-10-16: 255 OI2026-10-21: 245 OI2026-10-23: 244 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, 2026Viewing244-1
Oct 21, 2026245-10
Oct 16, 2026255+5
Oct 15, 2026250+43
Oct 14, 20262070
Oct 13, 2026207+69
Oct 09, 2026138+113
Oct 08, 2026250
Oct 07, 2026250
Oct 06, 202625+15
Oct 05, 2026100
Oct 02, 202610No prior observation