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.
Direxion Daily Semiconductor Bull 3X ETF (SOXL) had 150-Day Historical Volatility (Parkinson) of 0.8298 for 2026-05-11.
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