OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

B $35.00 Call

B270115C00035000

Latest saved OI18,085Oct 23, 2026
Last change-9vs 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. 18,1049,0520 2026-10-02: 18,032 OI2026-10-05: 18,075 OI2026-10-06: 18,075 OI2026-10-07: 18,075 OI2026-10-08: 18,075 OI2026-10-09: 18,075 OI2026-10-13: 18,075 OI2026-10-14: 18,066 OI2026-10-15: 18,104 OI2026-10-16: 18,094 OI2026-10-21: 18,094 OI2026-10-23: 18,085 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, 2026Viewing18,085-9
Oct 21, 202618,0940
Oct 16, 202618,094-10
Oct 15, 202618,104+38
Oct 14, 202618,066-9
Oct 13, 202618,0750
Oct 09, 202618,0750
Oct 08, 202618,0750
Oct 07, 202618,0750
Oct 06, 202618,0750
Oct 05, 202618,075+43
Oct 02, 202618,032No prior observation