Historical Volatility (Parkinson) (20-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.
Amplify HACK Cybersecurity Covered Call ETF (HAKY) had 20-Day Historical Volatility (Parkinson) of 0.2065 for 2026-02-20.
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