OITracker Cboe delayed data

Contract OI history

Back to B

Jan 21, 2028 EXPIRATION

B $25.00 Put

B280121P00025000

Latest saved OI3,518Oct 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 $25.00 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. 3,5221,7610 2026-10-02: 1,611 OI2026-10-05: 1,614 OI2026-10-06: 1,614 OI2026-10-07: 1,614 OI2026-10-08: 3,070 OI2026-10-09: 3,127 OI2026-10-13: 3,114 OI2026-10-14: 3,358 OI2026-10-15: 3,457 OI2026-10-16: 3,522 OI2026-10-21: 3,516 OI2026-10-23: 3,518 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, 2026Viewing3,518+2
Oct 21, 20263,516-6
Oct 16, 20263,522+65
Oct 15, 20263,457+99
Oct 14, 20263,358+244
Oct 13, 20263,114-13
Oct 09, 20263,127+57
Oct 08, 20263,070+1,456
Oct 07, 20261,6140
Oct 06, 20261,6140
Oct 05, 20261,614+3
Oct 02, 20261,611No prior observation