OITracker Cboe delayed data

Contract OI history

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Oct 23, 2026 EXPIRATION

PSX $287.50 Put

PSX261023P00287500

Latest saved OI79Oct 23, 2026
Last change-4vs previous saved observation
Saved market days8Oct 08, 2026 onwards
Daily open interest Hover a point for its date and OI
PSX $287.50 put open interest history 8 saved observations from 2026-10-08 to 2026-10-23. Exact values and changes are listed in the table below. 83410 2026-10-08: 0 OI2026-10-09: 1 OI2026-10-13: 21 OI2026-10-14: 21 OI2026-10-15: 30 OI2026-10-16: 54 OI2026-10-21: 83 OI2026-10-23: 79 OI Oct 08, 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, 2026Viewing79-4
Oct 21, 202683+29
Oct 16, 202654+24
Oct 15, 202630+9
Oct 14, 2026210
Oct 13, 202621+20
Oct 09, 20261+1
Oct 08, 20260No prior observation