OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

CAL $12.50 Put

CAL261120P00012500

Latest saved OI928Oct 23, 2026
Last change+16vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAL $12.50 put open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 9284640 2026-10-02: 629 OI2026-10-05: 629 OI2026-10-06: 629 OI2026-10-07: 833 OI2026-10-08: 833 OI2026-10-09: 883 OI2026-10-13: 883 OI2026-10-14: 884 OI2026-10-16: 885 OI2026-10-20: 912 OI2026-10-23: 928 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

CAL contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing928+16
Oct 20, 2026912+27
Oct 16, 2026885+1
Oct 14, 2026884+1
Oct 13, 20268830
Oct 09, 2026883+50
Oct 08, 20268330
Oct 07, 2026833+204
Oct 06, 20266290
Oct 05, 20266290
Oct 02, 2026629No prior observation