Put-Call Ratio (Volume) (90-Day)

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

Amphastar Pharmaceuticals, Inc. (AMPH) had 90-Day Put-Call Ratio (Volume) of 0.0000 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4103
Historical Volatility (Parkinson)	0.4220
Implied Volatility (Calls)	0.4831
Implied Volatility (Puts)	0.4992
Implied Volatility (Mean)	0.4911
Put-Call Implied Volatility Ratio	1.0333
Implied Volatility Skew	0.0044
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.2352