OITracker Cboe delayed data

Contract OI history

Back to BIIB

Dec 18, 2026 EXPIRATION

BIIB $165.00 Put

BIIB261218P00165000

Latest saved OI110Oct 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 $165.00 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. 110550 2026-10-09: 109 OI2026-10-13: 109 OI2026-10-14: 109 OI2026-10-15: 110 OI2026-10-16: 110 OI2026-10-21: 110 OI2026-10-23: 110 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, 2026Viewing1100
Oct 21, 20261100
Oct 16, 20261100
Oct 15, 2026110+1
Oct 14, 20261090
Oct 13, 20261090
Oct 09, 2026109No prior observation