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Contract OI history

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Jan 21, 2028 EXPIRATION

WES $42.00 Put

WES280121P00042000

Latest saved OI200Oct 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 $42.00 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. 2001000 2026-10-02: 195 OI2026-10-05: 195 OI2026-10-06: 195 OI2026-10-07: 195 OI2026-10-08: 195 OI2026-10-09: 195 OI2026-10-13: 195 OI2026-10-14: 195 OI2026-10-16: 195 OI2026-10-20: 200 OI2026-10-23: 200 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, 2026Viewing2000
Oct 20, 2026200+5
Oct 16, 20261950
Oct 14, 20261950
Oct 13, 20261950
Oct 09, 20261950
Oct 08, 20261950
Oct 07, 20261950
Oct 06, 20261950
Oct 05, 20261950
Oct 02, 2026195No prior observation