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 0.1078 for 2025-08-28.

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Figures for 2025-08-28

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6149
Historical Volatility (Parkinson)	0.3065
Implied Volatility (Calls)	0.6274
Implied Volatility (Puts)	0.5018
Implied Volatility (Mean)	0.5646
Put-Call Implied Volatility Ratio	0.7999
Implied Volatility Skew	0.1283
Option Statistics
Put-Call Ratio (Volume)	0.1078
Put-Call Ratio (Open Interest)	0.4118