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Contract OI history

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Jan 21, 2028 EXPIRATION

WES $40.00 Call

WES280121C00040000

Latest saved OI909Oct 23, 2026
Last change+1vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
WES $40.00 call open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 9094540 2026-10-02: 907 OI2026-10-05: 907 OI2026-10-06: 908 OI2026-10-07: 908 OI2026-10-08: 908 OI2026-10-09: 908 OI2026-10-13: 908 OI2026-10-14: 908 OI2026-10-16: 908 OI2026-10-20: 908 OI2026-10-23: 909 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, 2026Viewing909+1
Oct 20, 20269080
Oct 16, 20269080
Oct 14, 20269080
Oct 13, 20269080
Oct 09, 20269080
Oct 08, 20269080
Oct 07, 20269080
Oct 06, 2026908+1
Oct 05, 20269070
Oct 02, 2026907No prior observation