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.
First Trust Mid Cap Value AlphaDEX ETF (FNK) had 150-Day Historical Volatility (Parkinson) of 0.1006 for 2026-01-20.
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