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 High Dividend Yield Index Fund ETF Shares (VYM) had 20-Day Historical Volatility (Parkinson) of 0.1169 for 2026-03-09.
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