OITracker Cboe delayed data

Contract OI history

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Oct 23, 2026 EXPIRATION

M $20.50 Put

M261023P00020500

Latest saved OI151Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
M $20.50 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 151750 2026-10-02: 139 OI2026-10-05: 139 OI2026-10-06: 139 OI2026-10-07: 139 OI2026-10-08: 139 OI2026-10-09: 139 OI2026-10-13: 142 OI2026-10-14: 142 OI2026-10-15: 151 OI2026-10-16: 151 OI2026-10-21: 151 OI2026-10-23: 151 OI Oct 02, 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, 2026Viewing1510
Oct 21, 20261510
Oct 16, 20261510
Oct 15, 2026151+9
Oct 14, 20261420
Oct 13, 2026142+3
Oct 09, 20261390
Oct 08, 20261390
Oct 07, 20261390
Oct 06, 20261390
Oct 05, 20261390
Oct 02, 2026139No prior observation