Put-Call Ratio (Volume) (150-Day)

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

Krystal Biotech, Inc. (KRYS) had 150-Day Put-Call Ratio (Volume) of 0.1607 for 2026-01-20.

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Figures for 2026-01-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3621
Historical Volatility (Parkinson)	0.3819
Implied Volatility (Calls)	0.4958
Implied Volatility (Puts)	0.4903
Implied Volatility (Mean)	0.4930
Put-Call Implied Volatility Ratio	0.9888
Implied Volatility Skew	0.0012
Option Statistics
Put-Call Ratio (Volume)	0.1607
Put-Call Ratio (Open Interest)	0.5998