OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

M $20.00 Put

M261218P00020000

Latest saved OI631Oct 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 $20.00 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. 6313150 2026-10-02: 484 OI2026-10-05: 541 OI2026-10-06: 542 OI2026-10-07: 592 OI2026-10-08: 592 OI2026-10-09: 602 OI2026-10-13: 612 OI2026-10-14: 612 OI2026-10-15: 612 OI2026-10-16: 564 OI2026-10-21: 631 OI2026-10-23: 631 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, 2026Viewing6310
Oct 21, 2026631+67
Oct 16, 2026564-48
Oct 15, 20266120
Oct 14, 20266120
Oct 13, 2026612+10
Oct 09, 2026602+10
Oct 08, 20265920
Oct 07, 2026592+50
Oct 06, 2026542+1
Oct 05, 2026541+57
Oct 02, 2026484No prior observation