Historical Volatility (Parkinson) (20-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.
Guinness Atkinson US Dividend Builder ETF (GAUD) had 20-Day Historical Volatility (Parkinson) of 0.0101 for 2026-02-13.
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