OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

WM $220.00 Put

WM261120P00220000

Latest saved OI543Oct 23, 2026
Last change-11vs 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. 5542770 2026-10-02: 144 OI2026-10-05: 162 OI2026-10-06: 166 OI2026-10-07: 177 OI2026-10-08: 177 OI2026-10-09: 177 OI2026-10-14: 200 OI2026-10-15: 250 OI2026-10-16: 247 OI2026-10-21: 554 OI2026-10-23: 543 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, 2026543-11
Oct 21, 2026Viewing554+307
Oct 16, 2026247-3
Oct 15, 2026250+50
Oct 14, 2026200+23
Oct 09, 20261770
Oct 08, 20261770
Oct 07, 2026177+11
Oct 06, 2026166+4
Oct 05, 2026162+18
Oct 02, 2026144No prior observation