OITracker Cboe delayed data

Contract OI history

Back to B

Dec 15, 2028 EXPIRATION

B $40.00 Put

B281215P00040000

Latest saved OI1,060Oct 23, 2026
Last change0vs 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. 1,0605300 2026-10-02: 310 OI2026-10-05: 310 OI2026-10-06: 310 OI2026-10-07: 1,060 OI2026-10-08: 1,060 OI2026-10-09: 1,060 OI2026-10-13: 1,060 OI2026-10-14: 1,060 OI2026-10-15: 1,060 OI2026-10-16: 1,060 OI2026-10-21: 1,060 OI2026-10-23: 1,060 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, 2026Viewing1,0600
Oct 21, 20261,0600
Oct 16, 20261,0600
Oct 15, 20261,0600
Oct 14, 20261,0600
Oct 13, 20261,0600
Oct 09, 20261,0600
Oct 08, 20261,0600
Oct 07, 20261,060+750
Oct 06, 20263100
Oct 05, 20263100
Oct 02, 2026310No prior observation