Put-Call Ratio (Volume) (10-Day)

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

Amphastar Pharmaceuticals, Inc. (AMPH) 10-Day Put-Call Ratio (Volume) data is not available for 2026-06-04.

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Figures for 2026-06-04

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3386
Historical Volatility (Parkinson)	0.3593
Implied Volatility (Calls)	0.9509
Implied Volatility (Puts)	0.6342
Implied Volatility (Mean)	0.7925
Put-Call Implied Volatility Ratio	0.6670
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.0322