Put-Call Ratio (Volume) (180-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

Biogen Inc. (BIIB) had 180-Day Put-Call Ratio (Volume) of 1.0000 for 2026-05-08.

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Figures for 2026-05-08

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3325
Historical Volatility (Parkinson)	0.3080
Implied Volatility (Calls)	0.3500
Implied Volatility (Puts)	0.3591
Implied Volatility (Mean)	0.3545
Put-Call Implied Volatility Ratio	1.0261
Implied Volatility Skew	0.0145
Option Statistics
Put-Call Ratio (Volume)	1.0000
Put-Call Ratio (Open Interest)	0.5673