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Contract OI history

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Dec 18, 2026 EXPIRATION

WM $220.00 Put

WM261218P00220000

Latest saved OI191Oct 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
WM $220.00 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. 197980 2026-10-02: 181 OI2026-10-05: 186 OI2026-10-06: 186 OI2026-10-07: 186 OI2026-10-08: 186 OI2026-10-09: 184 OI2026-10-14: 183 OI2026-10-15: 186 OI2026-10-16: 197 OI2026-10-21: 193 OI2026-10-23: 191 OI Oct 02, 2026Oct 23, 2026

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

WM contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026191-2
Oct 21, 2026Viewing193-4
Oct 16, 2026197+11
Oct 15, 2026186+3
Oct 14, 2026183-1
Oct 09, 2026184-2
Oct 08, 20261860
Oct 07, 20261860
Oct 06, 20261860
Oct 05, 2026186+5
Oct 02, 2026181No prior observation