Historical Volatility (Parkinson) (90-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 Bear 2X Shares (AIBD) had 90-Day Historical Volatility (Parkinson) of 0.3818 for 2026-01-20.
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