Put-Call Ratio (Open Interest) (30-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

Biogen Inc. (BIIB) had 30-Day Put-Call Ratio (Open Interest) of 1.1897 for 2025-06-25.

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Figures for 2025-06-25

Volatility Metrics
Historical Volatility (Close-to-Close)	0.2687
Historical Volatility (Parkinson)	0.2432
Implied Volatility (Calls)	0.3344
Implied Volatility (Puts)	0.3103
Implied Volatility (Mean)	0.3223
Put-Call Implied Volatility Ratio	0.9280
Implied Volatility Skew	0.0708
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	1.1897