OITracker Cboe delayed data

Contract OI history

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Oct 23, 2026 EXPIRATION

M $21.00 Put

M261023P00021000

Latest saved OI108Oct 23, 2026
Last change-30vs 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. 139690 2026-10-02: 13 OI2026-10-05: 13 OI2026-10-06: 63 OI2026-10-07: 63 OI2026-10-08: 63 OI2026-10-09: 104 OI2026-10-13: 139 OI2026-10-14: 139 OI2026-10-15: 138 OI2026-10-16: 128 OI2026-10-21: 138 OI2026-10-23: 108 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, 2026Viewing108-30
Oct 21, 2026138+10
Oct 16, 2026128-10
Oct 15, 2026138-1
Oct 14, 20261390
Oct 13, 2026139+35
Oct 09, 2026104+41
Oct 08, 2026630
Oct 07, 2026630
Oct 06, 202663+50
Oct 05, 2026130
Oct 02, 202613No prior observation