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Contract OI history

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Mar 19, 2027 EXPIRATION

BIIB $230.00 Put

BIIB270319P00230000

Latest saved OI62Oct 23, 2026
Last change0vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $230.00 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. 62310 2026-10-09: 23 OI2026-10-13: 23 OI2026-10-14: 23 OI2026-10-15: 38 OI2026-10-16: 38 OI2026-10-21: 62 OI2026-10-23: 62 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, 2026Viewing620
Oct 21, 202662+24
Oct 16, 2026380
Oct 15, 202638+15
Oct 14, 2026230
Oct 13, 2026230
Oct 09, 202623No prior observation