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 Utilities XLU Defined Volatility ETF (DVUT) had 180-Day Historical Volatility (Parkinson) of 0.0415 for 2026-02-20.
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