Put-Call Ratio (Volume) (120-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 120-Day Put-Call Ratio (Volume) of 0.0048 for 2026-09-04.

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Figures for 2026-09-04

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5281
Historical Volatility (Parkinson)	0.4370
Implied Volatility (Calls)	0.5638
Implied Volatility (Puts)	0.6842
Implied Volatility (Mean)	0.6240
Put-Call Implied Volatility Ratio	1.2136
Implied Volatility Skew	0.0717
Option Statistics
Put-Call Ratio (Volume)	0.0048
Put-Call Ratio (Open Interest)	4.9061