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Contract OI history

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Dec 18, 2026 EXPIRATION

BIIB $250.00 Call

BIIB261218C00250000

Latest saved OI317Oct 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 $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. 3171580 2026-10-09: 311 OI2026-10-13: 317 OI2026-10-14: 317 OI2026-10-15: 317 OI2026-10-16: 316 OI2026-10-21: 316 OI2026-10-23: 317 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, 2026Viewing317+1
Oct 21, 20263160
Oct 16, 2026316-1
Oct 15, 20263170
Oct 14, 20263170
Oct 13, 2026317+6
Oct 09, 2026311No prior observation