OITracker Cboe delayed data

Contract OI history

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Oct 30, 2026 EXPIRATION

M $21.00 Put

M261030P00021000

Latest saved OI49Oct 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 $21.00 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. 53260 2026-10-02: 17 OI2026-10-05: 17 OI2026-10-06: 17 OI2026-10-07: 16 OI2026-10-08: 16 OI2026-10-09: 45 OI2026-10-13: 49 OI2026-10-14: 49 OI2026-10-15: 53 OI2026-10-16: 53 OI2026-10-21: 49 OI2026-10-23: 49 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, 2026Viewing490
Oct 21, 202649-4
Oct 16, 2026530
Oct 15, 202653+4
Oct 14, 2026490
Oct 13, 202649+4
Oct 09, 202645+29
Oct 08, 2026160
Oct 07, 202616-1
Oct 06, 2026170
Oct 05, 2026170
Oct 02, 202617No prior observation