OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

CAL $17.50 Call

CAL261218C00017500

Latest saved OI1,212Oct 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. 1,2126060 2026-10-02: 1,212 OI2026-10-05: 1,212 OI2026-10-06: 1,212 OI2026-10-07: 1,212 OI2026-10-08: 1,212 OI2026-10-09: 1,212 OI2026-10-13: 1,212 OI2026-10-14: 1,212 OI2026-10-16: 1,212 OI2026-10-20: 1,212 OI2026-10-23: 1,212 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, 2026Viewing1,2120
Oct 20, 20261,2120
Oct 16, 20261,2120
Oct 14, 20261,2120
Oct 13, 20261,2120
Oct 09, 20261,2120
Oct 08, 20261,2120
Oct 07, 20261,2120
Oct 06, 20261,2120
Oct 05, 20261,2120
Oct 02, 20261,212No prior observation