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Contract OI history

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Dec 18, 2026 EXPIRATION

BIIB $255.00 Call

BIIB261218C00255000

Latest saved OI189Oct 23, 2026
Last change-1vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $255.00 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. 2051020 2026-10-09: 201 OI2026-10-13: 205 OI2026-10-14: 205 OI2026-10-15: 200 OI2026-10-16: 201 OI2026-10-21: 190 OI2026-10-23: 189 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, 2026Viewing189-1
Oct 21, 2026190-11
Oct 16, 2026201+1
Oct 15, 2026200-5
Oct 14, 20262050
Oct 13, 2026205+4
Oct 09, 2026201No prior observation