Put-Call Ratio (Open Interest) (30-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

Zai Lab Limited Unsponsored ADR (ZLAB) had 30-Day Put-Call Ratio (Open Interest) of 0.2255 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