OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

M $21.50 Put

M261120P00021500

Latest saved OI70Oct 23, 2026
Last change+5vs previous saved observation
Saved market days2Oct 21, 2026 onwards
Daily open interest Hover a point for its date and OI
M $21.50 put open interest history 2 saved observations from 2026-10-21 to 2026-10-23. Exact values and changes are listed in the table below. 70350 2026-10-21: 65 OI2026-10-23: 70 OI Oct 21, 2026Oct 23, 2026

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

M contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing70+5
Oct 21, 202665No prior observation