Historical Volatility (Parkinson) (150-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.
State Street Utilities Select Sector SPDR ETF (XLU) had 150-Day Historical Volatility (Parkinson) of 0.1234 for 2026-01-21.
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