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.
Vanguard International High Dividend Yield ETF (VYMI) had 20-Day Historical Volatility (Parkinson) of 0.0533 for 2026-01-20.
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