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Contract OI history

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Nov 20, 2026 EXPIRATION

WES $43.00 Put

WES261120P00043000

Latest saved OI295Oct 23, 2026
Last change+2vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WES $43.00 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. 2951470 2026-10-02: 203 OI2026-10-05: 203 OI2026-10-06: 204 OI2026-10-07: 204 OI2026-10-08: 225 OI2026-10-09: 225 OI2026-10-13: 226 OI2026-10-14: 227 OI2026-10-16: 250 OI2026-10-20: 293 OI2026-10-23: 295 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, 2026Viewing295+2
Oct 20, 2026293+43
Oct 16, 2026250+23
Oct 14, 2026227+1
Oct 13, 2026226+1
Oct 09, 20262250
Oct 08, 2026225+21
Oct 07, 20262040
Oct 06, 2026204+1
Oct 05, 20262030
Oct 02, 2026203No prior observation