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 4.0179 for 2025-05-30.

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Figures for 2025-05-30

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5104
Historical Volatility (Parkinson)	0.3787
Implied Volatility (Calls)	0.6116
Implied Volatility (Puts)	0.4735
Implied Volatility (Mean)	0.5426
Put-Call Implied Volatility Ratio	0.7742
Implied Volatility Skew	0.2084
Option Statistics
Put-Call Ratio (Volume)	4.0179
Put-Call Ratio (Open Interest)	0.2255