OITracker Cboe delayed data

Contract OI history

Back to B

Oct 23, 2026 EXPIRATION

B $40.00 Put

B261023P00040000

Latest saved OI1,148Oct 23, 2026
Last change-70vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $40.00 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. 1,2186090 2026-10-02: 120 OI2026-10-05: 202 OI2026-10-06: 202 OI2026-10-07: 202 OI2026-10-08: 203 OI2026-10-09: 190 OI2026-10-13: 235 OI2026-10-14: 269 OI2026-10-15: 299 OI2026-10-16: 314 OI2026-10-21: 1,218 OI2026-10-23: 1,148 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, 2026Viewing1,148-70
Oct 21, 20261,218+904
Oct 16, 2026314+15
Oct 15, 2026299+30
Oct 14, 2026269+34
Oct 13, 2026235+45
Oct 09, 2026190-13
Oct 08, 2026203+1
Oct 07, 20262020
Oct 06, 20262020
Oct 05, 2026202+82
Oct 02, 2026120No prior observation