Put-Call Ratio (Volume) (20-Day)

Put-Call Ratio (Volume): The ratio of puts traded to calls traded, for options with the relevant expiration date.

BillionToOne, Inc. (BLLN) had 20-Day Put-Call Ratio (Volume) of 0.0571 for 2026-05-22.

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Figures for 2026-05-22

Volatility Metrics
Historical Volatility (Close-to-Close)	1.1611
Historical Volatility (Parkinson)	1.0108
Implied Volatility (Calls)	0.7804
Implied Volatility (Puts)	0.7734
Implied Volatility (Mean)	0.7769
Put-Call Implied Volatility Ratio	0.9910
Implied Volatility Skew	-0.0198
Option Statistics
Put-Call Ratio (Volume)	0.0571
Put-Call Ratio (Open Interest)	1.7981