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.

Zai Lab Limited Unsponsored ADR (ZLAB) had 30-Day Put-Call Ratio (Volume) of 4.2857 for 2025-12-05.

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Figures for 2025-12-05

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3501
Historical Volatility (Parkinson)	0.3667
Implied Volatility (Calls)	0.8116
Implied Volatility (Puts)	0.5661
Implied Volatility (Mean)	0.6888
Put-Call Implied Volatility Ratio	0.6975
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	4.2857
Put-Call Ratio (Open Interest)	0.6656