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.
Amplify HACK Cybersecurity Covered Call ETF (HAKY) had 90-Day Historical Volatility (Parkinson) of 0.1738 for 2026-05-22.
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