OITracker Cboe delayed data

Contract OI history

Back to B

Jan 21, 2028 EXPIRATION

B $50.00 Put

B280121P00050000

Latest saved OI1,433Oct 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 $50.00 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. 1,4367180 2026-10-02: 1,436 OI2026-10-05: 1,436 OI2026-10-06: 1,436 OI2026-10-07: 1,436 OI2026-10-08: 1,436 OI2026-10-09: 1,432 OI2026-10-13: 1,432 OI2026-10-14: 1,432 OI2026-10-15: 1,432 OI2026-10-16: 1,432 OI2026-10-21: 1,432 OI2026-10-23: 1,433 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, 2026Viewing1,433+1
Oct 21, 20261,4320
Oct 16, 20261,4320
Oct 15, 20261,4320
Oct 14, 20261,4320
Oct 13, 20261,4320
Oct 09, 20261,432-4
Oct 08, 20261,4360
Oct 07, 20261,4360
Oct 06, 20261,4360
Oct 05, 20261,4360
Oct 02, 20261,436No prior observation