Put-Call Ratio (Volume) (20-Day)

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

Catalyst Pharmaceuticals, Inc. (CPRX) had 20-Day Put-Call Ratio (Volume) of 0.7443 for 2026-03-05.

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Figures for 2026-03-05

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4413
Historical Volatility (Parkinson)	0.4523
Implied Volatility (Calls)	0.5305
Implied Volatility (Puts)	0.4954
Implied Volatility (Mean)	0.5130
Put-Call Implied Volatility Ratio	0.9338
Implied Volatility Skew	0.0811
Option Statistics
Put-Call Ratio (Volume)	0.7443
Put-Call Ratio (Open Interest)	0.3604