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.

Altimmune, Inc. (ALT) had 90-Day Put-Call Ratio (Volume) of 0.1032 for 2026-04-20.

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Figures for 2026-04-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.8570
Historical Volatility (Parkinson)	0.7214
Implied Volatility (Calls)	0.7826
Implied Volatility (Puts)	0.8399
Implied Volatility (Mean)	0.8113
Put-Call Implied Volatility Ratio	1.0732
Implied Volatility Skew	-0.0097
Option Statistics
Put-Call Ratio (Volume)	0.1032
Put-Call Ratio (Open Interest)	0.1503