Historical Volatility (Parkinson) (180-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 AI and Big Data Bull 2X Shares (AIBU) had 180-Day Historical Volatility (Parkinson) of 0.3506 for 2026-01-20.
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