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.

State Street SPDR S&P Biotech ETF (XBI) had 120-Day Put-Call Ratio (Volume) of 3.6015 for 2026-07-21.

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Figures for 2026-07-21

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3216
Historical Volatility (Parkinson)	0.2583
Implied Volatility (Calls)	0.3213
Implied Volatility (Puts)	0.3394
Implied Volatility (Mean)	0.3303
Put-Call Implied Volatility Ratio	1.0562
Implied Volatility Skew	0.0022
Option Statistics
Put-Call Ratio (Volume)	3.6015
Put-Call Ratio (Open Interest)	1.0337