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 Intermediate Term Treasury ETF (SPTI) had 120-Day Historical Volatility (Parkinson) of 0.0191 for 2026-01-20.
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