OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

M $20.00 Put

M280121P00020000

Latest saved OI770Oct 23, 2026
Last change+28vs 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. 7703850 2026-10-02: 687 OI2026-10-05: 693 OI2026-10-06: 694 OI2026-10-07: 694 OI2026-10-08: 694 OI2026-10-09: 742 OI2026-10-13: 742 OI2026-10-14: 742 OI2026-10-15: 742 OI2026-10-16: 742 OI2026-10-21: 742 OI2026-10-23: 770 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, 2026Viewing770+28
Oct 21, 20267420
Oct 16, 20267420
Oct 15, 20267420
Oct 14, 20267420
Oct 13, 20267420
Oct 09, 2026742+48
Oct 08, 20266940
Oct 07, 20266940
Oct 06, 2026694+1
Oct 05, 2026693+6
Oct 02, 2026687No prior observation