OITracker Cboe delayed data

Contract OI history

Back to B

Jan 21, 2028 EXPIRATION

B $18.00 Put

B280121P00018000

Latest saved OI673Oct 23, 2026
Last change+1vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $18.00 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. 6753370 2026-10-02: 674 OI2026-10-05: 675 OI2026-10-06: 675 OI2026-10-07: 675 OI2026-10-08: 675 OI2026-10-09: 675 OI2026-10-13: 675 OI2026-10-14: 675 OI2026-10-15: 672 OI2026-10-16: 672 OI2026-10-21: 672 OI2026-10-23: 673 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, 2026Viewing673+1
Oct 21, 20266720
Oct 16, 20266720
Oct 15, 2026672-3
Oct 14, 20266750
Oct 13, 20266750
Oct 09, 20266750
Oct 08, 20266750
Oct 07, 20266750
Oct 06, 20266750
Oct 05, 2026675+1
Oct 02, 2026674No prior observation