OITracker Cboe delayed data

Contract OI history

Back to B

Oct 30, 2026 EXPIRATION

B $37.50 Put

B261030P00037500

Latest saved OI123Oct 23, 2026
Last change+106vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
B $37.50 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 123610 2026-10-09: 0 OI2026-10-13: 0 OI2026-10-14: 0 OI2026-10-15: 1 OI2026-10-16: 1 OI2026-10-21: 17 OI2026-10-23: 123 OI Oct 09, 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, 2026Viewing123+106
Oct 21, 202617+16
Oct 16, 202610
Oct 15, 20261+1
Oct 14, 202600
Oct 13, 202600
Oct 09, 20260No prior observation