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.

Alkermes plc (ALKS) had 30-Day Put-Call Ratio (Volume) of 0.2736 for 2026-10-20.

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Figures for 2026-10-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3609
Historical Volatility (Parkinson)	0.3513
Implied Volatility (Calls)	0.4860
Implied Volatility (Puts)	0.4263
Implied Volatility (Mean)	0.4562
Put-Call Implied Volatility Ratio	0.8773
Implied Volatility Skew	0.0141
Option Statistics
Put-Call Ratio (Volume)	0.2736
Put-Call Ratio (Open Interest)	0.6569