OITracker Cboe delayed data

Contract OI history

Back to B

Dec 15, 2028 EXPIRATION

B $40.00 Call

B281215C00040000

Latest saved OI529Oct 23, 2026
Last change0vs 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. 5552770 2026-10-02: 540 OI2026-10-05: 555 OI2026-10-06: 555 OI2026-10-07: 554 OI2026-10-08: 554 OI2026-10-09: 554 OI2026-10-13: 554 OI2026-10-14: 554 OI2026-10-15: 551 OI2026-10-16: 549 OI2026-10-21: 529 OI2026-10-23: 529 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, 2026Viewing5290
Oct 21, 2026529-20
Oct 16, 2026549-2
Oct 15, 2026551-3
Oct 14, 20265540
Oct 13, 20265540
Oct 09, 20265540
Oct 08, 20265540
Oct 07, 2026554-1
Oct 06, 20265550
Oct 05, 2026555+15
Oct 02, 2026540No prior observation