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Contract OI history

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Dec 18, 2026 EXPIRATION

BIIB $205.00 Call

BIIB261218C00205000

Latest saved OI136Oct 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 $205.00 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. 138690 2026-10-09: 138 OI2026-10-13: 138 OI2026-10-14: 138 OI2026-10-15: 138 OI2026-10-16: 138 OI2026-10-21: 138 OI2026-10-23: 136 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, 2026Viewing136-2
Oct 21, 20261380
Oct 16, 20261380
Oct 15, 20261380
Oct 14, 20261380
Oct 13, 20261380
Oct 09, 2026138No prior observation