Put-Call Ratio (Open Interest) (180-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 180-Day Put-Call Ratio (Open Interest) of 0.1607 for 2026-03-05.

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Figures for 2026-03-05

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5005
Historical Volatility (Parkinson)	0.3817
Implied Volatility (Calls)	0.6974
Implied Volatility (Puts)	0.6929
Implied Volatility (Mean)	0.6951
Put-Call Implied Volatility Ratio	0.9935
Implied Volatility Skew	0.0213
Option Statistics
Put-Call Ratio (Volume)	--
Put-Call Ratio (Open Interest)	0.1607