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Contract OI history

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Nov 06, 2026 EXPIRATION

BIIB $220.00 Put

BIIB261106P00220000

Latest saved OI10Oct 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 $220.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 1050 2026-10-09: 4 OI2026-10-13: 3 OI2026-10-14: 9 OI2026-10-15: 9 OI2026-10-16: 9 OI2026-10-21: 9 OI2026-10-23: 10 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, 2026Viewing10+1
Oct 21, 202690
Oct 16, 202690
Oct 15, 202690
Oct 14, 20269+6
Oct 13, 20263-1
Oct 09, 20264No prior observation