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.

State Street SPDR S&P Biotech ETF (XBI) had 30-Day Put-Call Ratio (Volume) of 22.0952 for 2026-10-16.

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Figures for 2026-10-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3251
Historical Volatility (Parkinson)	0.2791
Implied Volatility (Calls)	0.3620
Implied Volatility (Puts)	0.3355
Implied Volatility (Mean)	0.3488
Put-Call Implied Volatility Ratio	0.9267
Implied Volatility Skew	0.0409
Option Statistics
Put-Call Ratio (Volume)	22.0952
Put-Call Ratio (Open Interest)	4.0618