OITracker Cboe delayed data

Contract OI history

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Oct 23, 2026 EXPIRATION

M $23.50 Put

M261023P00023500

Latest saved OI85Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
M $23.50 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. 85420 2026-10-02: 1 OI2026-10-05: 1 OI2026-10-06: 6 OI2026-10-07: 6 OI2026-10-08: 6 OI2026-10-09: 17 OI2026-10-13: 30 OI2026-10-14: 30 OI2026-10-15: 30 OI2026-10-16: 32 OI2026-10-21: 83 OI2026-10-23: 85 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, 2026Viewing85+2
Oct 21, 202683+51
Oct 16, 202632+2
Oct 15, 2026300
Oct 14, 2026300
Oct 13, 202630+13
Oct 09, 202617+11
Oct 08, 202660
Oct 07, 202660
Oct 06, 20266+5
Oct 05, 202610
Oct 02, 20261No prior observation