OITracker Cboe delayed data

Contract OI history

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Apr 16, 2027 EXPIRATION

WM $220.00 Put

WM270416P00220000

Latest saved OI8Oct 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. 840 2026-10-02: 2 OI2026-10-05: 2 OI2026-10-06: 2 OI2026-10-07: 3 OI2026-10-08: 3 OI2026-10-09: 3 OI2026-10-14: 3 OI2026-10-15: 3 OI2026-10-16: 4 OI2026-10-21: 6 OI2026-10-23: 8 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, 20268+2
Oct 21, 2026Viewing6+2
Oct 16, 20264+1
Oct 15, 202630
Oct 14, 202630
Oct 09, 202630
Oct 08, 202630
Oct 07, 20263+1
Oct 06, 202620
Oct 05, 202620
Oct 02, 20262No prior observation