OITracker Cboe delayed data

Contract OI history

Back to B

Jan 15, 2027 EXPIRATION

B $42.00 Put

B270115P00042000

Latest saved OI2,924Oct 23, 2026
Last change+2vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $42.00 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. 2,9341,4670 2026-10-02: 2,934 OI2026-10-05: 2,934 OI2026-10-06: 2,934 OI2026-10-07: 2,913 OI2026-10-08: 2,914 OI2026-10-09: 2,917 OI2026-10-13: 2,919 OI2026-10-14: 2,921 OI2026-10-15: 2,922 OI2026-10-16: 2,922 OI2026-10-21: 2,922 OI2026-10-23: 2,924 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, 2026Viewing2,924+2
Oct 21, 20262,9220
Oct 16, 20262,9220
Oct 15, 20262,922+1
Oct 14, 20262,921+2
Oct 13, 20262,919+2
Oct 09, 20262,917+3
Oct 08, 20262,914+1
Oct 07, 20262,913-21
Oct 06, 20262,9340
Oct 05, 20262,9340
Oct 02, 20262,934No prior observation