OITracker Cboe delayed data

Contract OI history

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Nov 13, 2026 EXPIRATION

B $40.00 Call

B261113C00040000

Latest saved OI75Oct 23, 2026
Last change+6vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $40.00 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. 75370 2026-10-02: 0 OI2026-10-05: 2 OI2026-10-06: 2 OI2026-10-07: 3 OI2026-10-08: 3 OI2026-10-09: 4 OI2026-10-13: 5 OI2026-10-14: 5 OI2026-10-15: 23 OI2026-10-16: 60 OI2026-10-21: 69 OI2026-10-23: 75 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, 2026Viewing75+6
Oct 21, 202669+9
Oct 16, 202660+37
Oct 15, 202623+18
Oct 14, 202650
Oct 13, 20265+1
Oct 09, 20264+1
Oct 08, 202630
Oct 07, 20263+1
Oct 06, 202620
Oct 05, 20262+2
Oct 02, 20260No prior observation