OITracker Cboe delayed data

Contract OI history

Back to B

Jan 21, 2028 EXPIRATION

B $30.00 Put

B280121P00030000

Latest saved OI6,398Oct 23, 2026
Last change+39vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $30.00 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. 6,3983,1990 2026-10-02: 6,306 OI2026-10-05: 6,306 OI2026-10-06: 6,306 OI2026-10-07: 6,306 OI2026-10-08: 6,306 OI2026-10-09: 6,336 OI2026-10-13: 6,340 OI2026-10-14: 6,340 OI2026-10-15: 6,362 OI2026-10-16: 6,362 OI2026-10-21: 6,359 OI2026-10-23: 6,398 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, 2026Viewing6,398+39
Oct 21, 20266,359-3
Oct 16, 20266,3620
Oct 15, 20266,362+22
Oct 14, 20266,3400
Oct 13, 20266,340+4
Oct 09, 20266,336+30
Oct 08, 20266,3060
Oct 07, 20266,3060
Oct 06, 20266,3060
Oct 05, 20266,3060
Oct 02, 20266,306No prior observation