Historical Volatility (Parkinson) (150-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 International Dividend Builder ETF (GAID) had 150-Day Historical Volatility (Parkinson) of 0.0066 for 2026-05-21.
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