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.

Krystal Biotech, Inc. (KRYS) had 30-Day Put-Call Ratio (Volume) of 0.5857 for 2025-10-13.

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Figures for 2025-10-13

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4172
Historical Volatility (Parkinson)	0.3690
Implied Volatility (Calls)	0.5435
Implied Volatility (Puts)	0.5589
Implied Volatility (Mean)	0.5512
Put-Call Implied Volatility Ratio	1.0285
Implied Volatility Skew	0.0508
Option Statistics
Put-Call Ratio (Volume)	0.5857
Put-Call Ratio (Open Interest)	2.1610