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 2.7434 for 2026-10-21.

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Figures for 2026-10-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.5187
Historical Volatility (Parkinson)	0.4286
Implied Volatility (Calls)	0.6532
Implied Volatility (Puts)	0.6637
Implied Volatility (Mean)	0.6585
Put-Call Implied Volatility Ratio	1.0160
Implied Volatility Skew	0.0153
Option Statistics
Put-Call Ratio (Volume)	2.7434
Put-Call Ratio (Open Interest)	2.2336