OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

WES $40.00 Put

WES270115P00040000

Latest saved OI442Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WES $40.00 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 4592290 2026-10-02: 459 OI2026-10-05: 459 OI2026-10-06: 459 OI2026-10-07: 439 OI2026-10-08: 439 OI2026-10-09: 439 OI2026-10-13: 442 OI2026-10-14: 442 OI2026-10-16: 442 OI2026-10-20: 442 OI2026-10-23: 442 OI Oct 02, 2026Oct 23, 2026

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

WES contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing4420
Oct 20, 20264420
Oct 16, 20264420
Oct 14, 20264420
Oct 13, 2026442+3
Oct 09, 20264390
Oct 08, 20264390
Oct 07, 2026439-20
Oct 06, 20264590
Oct 05, 20264590
Oct 02, 2026459No prior observation