Historical Volatility (Parkinson) (90-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 Morningstar Mega Cap Value ETF (MGV) had 90-Day Historical Volatility (Parkinson) of 0.0687 for 2026-10-19.
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