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.

Roku, Inc. (ROKU) had 30-Day Historical Volatility (Parkinson) of 0.3947 for 2025-05-30.

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Figures for 2025-05-30

Volatility Metrics
Historical Volatility (Close-to-Close)	0.6125
Historical Volatility (Parkinson)	0.3947
Implied Volatility (Calls)	0.4409
Implied Volatility (Puts)	0.4753
Implied Volatility (Mean)	0.4581
Put-Call Implied Volatility Ratio	1.0780
Implied Volatility Skew	0.0017
Option Statistics
Put-Call Ratio (Volume)	0.7422
Put-Call Ratio (Open Interest)	0.3373