Put-Call Ratio (Volume) (30-Day)

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

Biogen Inc. (BIIB) had 30-Day Put-Call Ratio (Volume) of 0.3889 for 2025-10-16.

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Figures for 2025-10-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4074
Historical Volatility (Parkinson)	0.3176
Implied Volatility (Calls)	0.5148
Implied Volatility (Puts)	0.4915
Implied Volatility (Mean)	0.5031
Put-Call Implied Volatility Ratio	0.9547
Implied Volatility Skew	0.0327
Option Statistics
Put-Call Ratio (Volume)	0.3889
Put-Call Ratio (Open Interest)	0.7724