OITracker Cboe delayed data

Contract OI history

Back to B

Dec 18, 2026 EXPIRATION

B $55.00 Put

B261218P00055000

Latest saved OI44Oct 23, 2026
Last change-298vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $55.00 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. 3771880 2026-10-02: 377 OI2026-10-05: 377 OI2026-10-06: 377 OI2026-10-07: 377 OI2026-10-08: 377 OI2026-10-09: 377 OI2026-10-13: 377 OI2026-10-14: 377 OI2026-10-15: 342 OI2026-10-16: 342 OI2026-10-21: 342 OI2026-10-23: 44 OI Oct 02, 2026Oct 23, 2026

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

B contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing44-298
Oct 21, 20263420
Oct 16, 20263420
Oct 15, 2026342-35
Oct 14, 20263770
Oct 13, 20263770
Oct 09, 20263770
Oct 08, 20263770
Oct 07, 20263770
Oct 06, 20263770
Oct 05, 20263770
Oct 02, 2026377No prior observation