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Contract OI history

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Dec 18, 2026 EXPIRATION

BIIB $240.00 Call

BIIB261218C00240000

Latest saved OI1,150Oct 23, 2026
Last change-5vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
BIIB $240.00 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. 1,1555770 2026-10-09: 243 OI2026-10-13: 240 OI2026-10-14: 237 OI2026-10-15: 238 OI2026-10-16: 653 OI2026-10-21: 1,155 OI2026-10-23: 1,150 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, 2026Viewing1,150-5
Oct 21, 20261,155+502
Oct 16, 2026653+415
Oct 15, 2026238+1
Oct 14, 2026237-3
Oct 13, 2026240-3
Oct 09, 2026243No prior observation