OITracker Cboe delayed data

Contract OI history

Back to B

Jun 17, 2027 EXPIRATION

B $40.00 Call

B270617C00040000

Latest saved OI1,404Oct 23, 2026
Last change+24vs 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. 1,4047020 2026-10-02: 1,367 OI2026-10-05: 1,366 OI2026-10-06: 1,366 OI2026-10-07: 1,366 OI2026-10-08: 1,375 OI2026-10-09: 1,377 OI2026-10-13: 1,377 OI2026-10-14: 1,378 OI2026-10-15: 1,379 OI2026-10-16: 1,380 OI2026-10-21: 1,380 OI2026-10-23: 1,404 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, 2026Viewing1,404+24
Oct 21, 20261,3800
Oct 16, 20261,380+1
Oct 15, 20261,379+1
Oct 14, 20261,378+1
Oct 13, 20261,3770
Oct 09, 20261,377+2
Oct 08, 20261,375+9
Oct 07, 20261,3660
Oct 06, 20261,3660
Oct 05, 20261,366-1
Oct 02, 20261,367No prior observation