OITracker Cboe delayed data

Contract OI history

Back to B

Nov 13, 2026 EXPIRATION

B $40.00 Put

B261113P00040000

Latest saved OI192Oct 23, 2026
Last change+147vs 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. 192960 2026-10-02: 0 OI2026-10-05: 1 OI2026-10-06: 1 OI2026-10-07: 4 OI2026-10-08: 4 OI2026-10-09: 4 OI2026-10-13: 8 OI2026-10-14: 8 OI2026-10-15: 9 OI2026-10-16: 10 OI2026-10-21: 45 OI2026-10-23: 192 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, 2026Viewing192+147
Oct 21, 202645+35
Oct 16, 202610+1
Oct 15, 20269+1
Oct 14, 202680
Oct 13, 20268+4
Oct 09, 202640
Oct 08, 202640
Oct 07, 20264+3
Oct 06, 202610
Oct 05, 20261+1
Oct 02, 20260No prior observation