OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

CB $340.00 Put

CB280121P00340000

Latest saved OI163Oct 23, 2026
Last change0vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
CB $340.00 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. 163810 2026-10-02: 38 OI2026-10-05: 39 OI2026-10-06: 39 OI2026-10-07: 39 OI2026-10-08: 39 OI2026-10-09: 39 OI2026-10-13: 142 OI2026-10-14: 142 OI2026-10-15: 142 OI2026-10-16: 142 OI2026-10-21: 163 OI2026-10-23: 163 OI Oct 02, 2026Oct 23, 2026

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

CB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing1630
Oct 21, 2026163+21
Oct 16, 20261420
Oct 15, 20261420
Oct 14, 20261420
Oct 13, 2026142+103
Oct 09, 2026390
Oct 08, 2026390
Oct 07, 2026390
Oct 06, 2026390
Oct 05, 202639+1
Oct 02, 202638No prior observation