OITracker Cboe delayed data

Contract OI history

Back to B

Jan 21, 2028 EXPIRATION

B $37.00 Put

B280121P00037000

Latest saved OI788Oct 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 $37.00 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. 7883940 2026-10-02: 571 OI2026-10-05: 583 OI2026-10-06: 583 OI2026-10-07: 586 OI2026-10-08: 591 OI2026-10-09: 594 OI2026-10-13: 591 OI2026-10-14: 767 OI2026-10-15: 779 OI2026-10-16: 779 OI2026-10-21: 788 OI2026-10-23: 788 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, 2026Viewing7880
Oct 21, 2026788+9
Oct 16, 20267790
Oct 15, 2026779+12
Oct 14, 2026767+176
Oct 13, 2026591-3
Oct 09, 2026594+3
Oct 08, 2026591+5
Oct 07, 2026586+3
Oct 06, 20265830
Oct 05, 2026583+12
Oct 02, 2026571No prior observation