Historical Volatility (Parkinson) (180-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 180-Day Historical Volatility (Parkinson) of 0.1836 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)	0.2162
Historical Volatility (Parkinson)	0.1836
Implied Volatility (Calls)	0.3997
Implied Volatility (Puts)	0.2104
Implied Volatility (Mean)	0.3051
Put-Call Implied Volatility Ratio	0.5265
Implied Volatility Skew	--
Option Statistics
Put-Call Ratio (Volume)	0.7500
Put-Call Ratio (Open Interest)	0.1748