OITracker Cboe delayed data

Contract OI history

Back to B

Jan 21, 2028 EXPIRATION

B $40.00 Call

B280121C00040000

Latest saved OI2,357Oct 23, 2026
Last change+115vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $40.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 2,3571,1780 2026-10-02: 1,683 OI2026-10-05: 1,688 OI2026-10-06: 1,688 OI2026-10-07: 1,690 OI2026-10-08: 1,682 OI2026-10-09: 1,692 OI2026-10-13: 1,695 OI2026-10-14: 2,021 OI2026-10-15: 2,222 OI2026-10-16: 2,229 OI2026-10-21: 2,242 OI2026-10-23: 2,357 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, 2026Viewing2,357+115
Oct 21, 20262,242+13
Oct 16, 20262,229+7
Oct 15, 20262,222+201
Oct 14, 20262,021+326
Oct 13, 20261,695+3
Oct 09, 20261,692+10
Oct 08, 20261,682-8
Oct 07, 20261,690+2
Oct 06, 20261,6880
Oct 05, 20261,688+5
Oct 02, 20261,683No prior observation