OITracker Cboe delayed data

Contract OI history

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Sep 17, 2027 EXPIRATION

WM $220.00 Put

WM270917P00220000

Latest saved OI102Oct 23, 2026
Last change-10vs 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. 112560 2026-10-02: 3 OI2026-10-05: 99 OI2026-10-06: 99 OI2026-10-07: 99 OI2026-10-08: 99 OI2026-10-09: 99 OI2026-10-14: 100 OI2026-10-15: 100 OI2026-10-16: 102 OI2026-10-21: 112 OI2026-10-23: 102 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, 2026102-10
Oct 21, 2026Viewing112+10
Oct 16, 2026102+2
Oct 15, 20261000
Oct 14, 2026100+1
Oct 09, 2026990
Oct 08, 2026990
Oct 07, 2026990
Oct 06, 2026990
Oct 05, 202699+96
Oct 02, 20263No prior observation