Historical Volatility (Parkinson) (10-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.

YieldMax GOOGL Option Income Strategy ETF (GOOY) had 10-Day Historical Volatility (Parkinson) of 0.1613 for 2026-01-20.

For much more extensive volatility insights, check out our new product VolVue:

Over 300 data fields encompassing historical volatility, implied volatility, and put-call ratios for multiple time frames
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Figures for 2026-01-20

Volatility Metrics
Historical Volatility (Close-to-Close)	0.1909
Historical Volatility (Parkinson)	0.1613
Implied Volatility (Calls)	0.3318
Implied Volatility (Puts)	0.2875
Implied Volatility (Mean)	0.3096
Put-Call Implied Volatility Ratio	0.8665
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	3.2000
Put-Call Ratio (Open Interest)	0.4815