OITracker Cboe delayed data

Contract OI history

Back to B

Oct 30, 2026 EXPIRATION

B $42.50 Call

B261030C00042500

Latest saved OI135Oct 23, 2026
Last change+25vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
B $42.50 call open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 135670 2026-10-09: 0 OI2026-10-13: 1 OI2026-10-14: 2 OI2026-10-15: 4 OI2026-10-16: 11 OI2026-10-21: 110 OI2026-10-23: 135 OI Oct 09, 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, 2026Viewing135+25
Oct 21, 2026110+99
Oct 16, 202611+7
Oct 15, 20264+2
Oct 14, 20262+1
Oct 13, 20261+1
Oct 09, 20260No prior observation