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.

Alnylam Pharmaceuticals, Inc. (ALNY) had 180-Day Put-Call Ratio (Volume) of 0.1937 for 2026-07-21.

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Figures for 2026-07-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3638
Historical Volatility (Parkinson)	0.3949
Implied Volatility (Calls)	0.5137
Implied Volatility (Puts)	0.5020
Implied Volatility (Mean)	0.5079
Put-Call Implied Volatility Ratio	0.9773
Implied Volatility Skew	0.0298
Option Statistics
Put-Call Ratio (Volume)	0.1937
Put-Call Ratio (Open Interest)	0.3386