Historical Volatility (Parkinson) (30-Day)

Historical Volatility (Parkinson): The past volatility of the security over the selected time frame, calculated using the high and low prices on each trading day.

PTC Inc. (PTC) had 30-Day Historical Volatility (Parkinson) of 0.1995 for 2026-01-20.

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Figures for 2026-01-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1934
Historical Volatility (Parkinson)	0.1995
Implied Volatility (Calls)	0.3189
Implied Volatility (Puts)	0.3117
Implied Volatility (Mean)	0.3153
Put-Call Implied Volatility Ratio	0.9775
Implied Volatility Skew	0.0478
Option Statistics
Put-Call Ratio (Volume)	0.0106
Put-Call Ratio (Open Interest)	0.8966