Historical Volatility (Parkinson) (120-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 SPDR Portfolio Mortgage Backed Bond ETF (SPMB) had 120-Day Historical Volatility (Parkinson) of 0.0268 for 2026-01-20.
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