Put-Call Ratio (Volume) (10-Day)

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

Biogen Inc. (BIIB) had 10-Day Put-Call Ratio (Volume) of 0.4286 for 2026-09-16.

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Figures for 2026-09-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2942
Historical Volatility (Parkinson)	0.2477
Implied Volatility (Calls)	0.2993
Implied Volatility (Puts)	0.3228
Implied Volatility (Mean)	0.3110
Put-Call Implied Volatility Ratio	1.0786
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	0.4286
Put-Call Ratio (Open Interest)	0.5797