OITracker Cboe delayed data

Contract OI history

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Jan 15, 2027 EXPIRATION

BIIB $250.00 Call

BIIB270115C00250000

Latest saved OI960Oct 23, 2026
Last change+2vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $250.00 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. 9604800 2026-10-09: 821 OI2026-10-13: 809 OI2026-10-14: 809 OI2026-10-15: 820 OI2026-10-16: 822 OI2026-10-21: 958 OI2026-10-23: 960 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

BIIB contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing960+2
Oct 21, 2026958+136
Oct 16, 2026822+2
Oct 15, 2026820+11
Oct 14, 20268090
Oct 13, 2026809-12
Oct 09, 2026821No prior observation