Historical Volatility (Parkinson) (10-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 High Yield Bond ETF (SPHY) had 10-Day Historical Volatility (Parkinson) of 0.0164 for 2026-01-20.
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