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.

Zenas BioPharma, Inc. (ZBIO) 90-Day Put-Call Ratio (Volume) data is not available for 2026-10-19.

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Figures for 2026-10-19

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5557
Historical Volatility (Parkinson)	0.6200
Implied Volatility (Calls)	0.8047
Implied Volatility (Puts)	0.8215
Implied Volatility (Mean)	0.8131
Put-Call Implied Volatility Ratio	1.0208
Implied Volatility Skew	0.0610
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.1731