Historical Volatility (Parkinson) (180-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.
WEBs Industrials XLI Defined Volatility ETF (DVIN) had 180-Day Historical Volatility (Parkinson) of 0.0469 for 2026-02-19.
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