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Contract OI history

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Dec 18, 2026 EXPIRATION

PSX $270.00 Put

PSX261218P00270000

Latest saved OI312Oct 23, 2026
Last change+4vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
PSX $270.00 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. 3121560 2026-10-02: 263 OI2026-10-05: 263 OI2026-10-06: 277 OI2026-10-07: 284 OI2026-10-08: 285 OI2026-10-09: 286 OI2026-10-13: 288 OI2026-10-14: 288 OI2026-10-15: 299 OI2026-10-16: 305 OI2026-10-21: 308 OI2026-10-23: 312 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, 2026Viewing312+4
Oct 21, 2026308+3
Oct 16, 2026305+6
Oct 15, 2026299+11
Oct 14, 20262880
Oct 13, 2026288+2
Oct 09, 2026286+1
Oct 08, 2026285+1
Oct 07, 2026284+7
Oct 06, 2026277+14
Oct 05, 20262630
Oct 02, 2026263No prior observation