OITracker Cboe delayed data

Contract OI history

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Dec 18, 2026 EXPIRATION

CAL $12.50 Put

CAL261218P00012500

Latest saved OI1,069Oct 23, 2026
Last change+15vs 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. 1,0695340 2026-10-02: 1,054 OI2026-10-05: 1,054 OI2026-10-06: 1,054 OI2026-10-07: 1,054 OI2026-10-08: 1,054 OI2026-10-09: 1,054 OI2026-10-13: 1,054 OI2026-10-14: 1,054 OI2026-10-16: 1,054 OI2026-10-20: 1,054 OI2026-10-23: 1,069 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, 2026Viewing1,069+15
Oct 20, 20261,0540
Oct 16, 20261,0540
Oct 14, 20261,0540
Oct 13, 20261,0540
Oct 09, 20261,0540
Oct 08, 20261,0540
Oct 07, 20261,0540
Oct 06, 20261,0540
Oct 05, 20261,0540
Oct 02, 20261,054No prior observation