OITracker Cboe delayed data

Contract OI history

Back to B

Oct 30, 2026 EXPIRATION

B $39.50 Put

B261030P00039500

Latest saved OI80Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
B $39.50 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. 80400 2026-10-09: 0 OI2026-10-13: 0 OI2026-10-14: 0 OI2026-10-15: 2 OI2026-10-16: 11 OI2026-10-21: 80 OI2026-10-23: 80 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, 2026Viewing800
Oct 21, 202680+69
Oct 16, 202611+9
Oct 15, 20262+2
Oct 14, 202600
Oct 13, 202600
Oct 09, 20260No prior observation