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.

PTC Therapeutics, Inc. (PTCT) had 20-Day Put-Call Ratio (Volume) of 0.0000 for 2026-07-20.

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Figures for 2026-07-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.4500
Historical Volatility (Parkinson)	0.4145
Implied Volatility (Calls)	0.6417
Implied Volatility (Puts)	0.6765
Implied Volatility (Mean)	0.6591
Put-Call Implied Volatility Ratio	1.0542
Implied Volatility Skew	0.0417
Option Statistics
Put-Call Ratio (Volume)	0.0000
Put-Call Ratio (Open Interest)	0.1126