Put-Call Ratio (Volume) (30-Day)

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

Altimmune, Inc. (ALT) had 30-Day Put-Call Ratio (Volume) of 0.0000 for 2026-02-19.

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Figures for 2026-02-19

Volatility Metrics
Historical Volatility (Close-to-Close)	1.0778
Historical Volatility (Parkinson)	0.9536
Implied Volatility (Calls)	0.8459
Implied Volatility (Puts)	1.1307
Implied Volatility (Mean)	0.9883
Put-Call Implied Volatility Ratio	1.3367
Implied Volatility Skew	-0.1289
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.2032