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 Top 10 Asia Memory ETF (AHBM) had 20-Day Historical Volatility (Parkinson) of 0.1607 for 2026-09-22.
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