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Contract OI history

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Jan 15, 2027 EXPIRATION

WES $42.00 Put

WES270115P00042000

Latest saved OI139Oct 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. 139690 2026-10-02: 127 OI2026-10-05: 127 OI2026-10-06: 112 OI2026-10-07: 112 OI2026-10-08: 112 OI2026-10-09: 112 OI2026-10-13: 111 OI2026-10-14: 111 OI2026-10-16: 127 OI2026-10-20: 139 OI2026-10-23: 139 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, 2026Viewing1390
Oct 20, 2026139+12
Oct 16, 2026127+16
Oct 14, 20261110
Oct 13, 2026111-1
Oct 09, 20261120
Oct 08, 20261120
Oct 07, 20261120
Oct 06, 2026112-15
Oct 05, 20261270
Oct 02, 2026127No prior observation