Put-Call Ratio (Open Interest) (30-Day)

Put-Call Ratio (Open Interest): The ratio of outstanding put contracts to outstanding call contracts at the close of the trading day, for options with the relevant expiration date.

PTC Therapeutics, Inc. (PTCT) had 30-Day Put-Call Ratio (Open Interest) of 0.4359 for 2026-01-16.

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Figures for 2026-01-16

Volatility Metrics
Historical Volatility (Close-to-Close)	0.3150
Historical Volatility (Parkinson)	0.4000
Implied Volatility (Calls)	0.4372
Implied Volatility (Puts)	0.3918
Implied Volatility (Mean)	0.4145
Put-Call Implied Volatility Ratio	0.8962
Implied Volatility Skew	0.0389
Option Statistics
Put-Call Ratio (Volume)	0.0577
Put-Call Ratio (Open Interest)	0.4359