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.
Invesco RAFI US 1000 ETF (PRF) had 10-Day Historical Volatility (Parkinson) of 0.1132 for 2026-03-06.
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