OITracker Cboe delayed data

Contract OI history

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Jan 21, 2028 EXPIRATION

B $35.00 Call

B280121C00035000

Latest saved OI5,781Oct 23, 2026
Last change+400vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $35.00 call open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 5,7812,8900 2026-10-02: 5,380 OI2026-10-05: 5,380 OI2026-10-06: 5,380 OI2026-10-07: 5,381 OI2026-10-08: 5,380 OI2026-10-09: 5,380 OI2026-10-13: 5,380 OI2026-10-14: 5,380 OI2026-10-15: 5,381 OI2026-10-16: 5,381 OI2026-10-21: 5,381 OI2026-10-23: 5,781 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, 2026Viewing5,781+400
Oct 21, 20265,3810
Oct 16, 20265,3810
Oct 15, 20265,381+1
Oct 14, 20265,3800
Oct 13, 20265,3800
Oct 09, 20265,3800
Oct 08, 20265,380-1
Oct 07, 20265,381+1
Oct 06, 20265,3800
Oct 05, 20265,3800
Oct 02, 20265,380No prior observation