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) had 90-Day Put-Call Ratio (Volume) of 0.2118 for 2026-01-20.

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Figures for 2026-01-20

Volatility Metrics
Historical Volatility (Close-to-Close)	1.9260
Historical Volatility (Parkinson)	1.0572
Implied Volatility (Calls)	1.1015
Implied Volatility (Puts)	1.2058
Implied Volatility (Mean)	1.1537
Put-Call Implied Volatility Ratio	1.0947
Implied Volatility Skew	0.0643
Option Statistics
Put-Call Ratio (Volume)	0.2118
Put-Call Ratio (Open Interest)	0.7839