OITracker Cboe delayed data

Contract OI history

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Mar 19, 2027 EXPIRATION

B $50.00 Call

B270319C00050000

Latest saved OI7,024Oct 23, 2026
Last change-23vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
B $50.00 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. 7,0473,5230 2026-10-02: 1,840 OI2026-10-05: 6,845 OI2026-10-06: 6,845 OI2026-10-07: 6,858 OI2026-10-08: 6,887 OI2026-10-09: 6,915 OI2026-10-13: 6,917 OI2026-10-14: 6,908 OI2026-10-15: 6,902 OI2026-10-16: 7,012 OI2026-10-21: 7,047 OI2026-10-23: 7,024 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, 2026Viewing7,024-23
Oct 21, 20267,047+35
Oct 16, 20267,012+110
Oct 15, 20266,902-6
Oct 14, 20266,908-9
Oct 13, 20266,917+2
Oct 09, 20266,915+28
Oct 08, 20266,887+29
Oct 07, 20266,858+13
Oct 06, 20266,8450
Oct 05, 20266,845+5,005
Oct 02, 20261,840No prior observation