OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

WM $220.00 Put

WM280121P00220000

Latest saved OI99Oct 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. 99490 2026-10-02: 79 OI2026-10-05: 79 OI2026-10-06: 79 OI2026-10-07: 80 OI2026-10-08: 80 OI2026-10-09: 81 OI2026-10-14: 81 OI2026-10-15: 81 OI2026-10-16: 92 OI2026-10-21: 89 OI2026-10-23: 99 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, 202699+10
Oct 21, 2026Viewing89-3
Oct 16, 202692+11
Oct 15, 2026810
Oct 14, 2026810
Oct 09, 202681+1
Oct 08, 2026800
Oct 07, 202680+1
Oct 06, 2026790
Oct 05, 2026790
Oct 02, 202679No prior observation