OITracker Cboe delayed data

Contract OI history

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Nov 20, 2026 EXPIRATION

CAL $17.50 Call

CAL261120C00017500

Latest saved OI1,971Oct 23, 2026
Last change0vs previous saved observation
Saved market days11Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CAL $17.50 call open interest history 11 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 1,9769880 2026-10-02: 1,976 OI2026-10-05: 1,976 OI2026-10-06: 1,976 OI2026-10-07: 1,973 OI2026-10-08: 1,973 OI2026-10-09: 1,973 OI2026-10-13: 1,973 OI2026-10-14: 1,973 OI2026-10-16: 1,971 OI2026-10-20: 1,971 OI2026-10-23: 1,971 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, 2026Viewing1,9710
Oct 20, 20261,9710
Oct 16, 20261,971-2
Oct 14, 20261,9730
Oct 13, 20261,9730
Oct 09, 20261,9730
Oct 08, 20261,9730
Oct 07, 20261,973-3
Oct 06, 20261,9760
Oct 05, 20261,9760
Oct 02, 20261,976No prior observation