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) 90-Day Put-Call Ratio (Volume) data is not available for 2026-06-03.

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Figures for 2026-06-03

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6355
Historical Volatility (Parkinson)	0.4014
Implied Volatility (Calls)	0.5835
Implied Volatility (Puts)	0.6735
Implied Volatility (Mean)	0.6285
Put-Call Implied Volatility Ratio	1.1542
Implied Volatility Skew	0.0725
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.0951