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.
Innovator Index Autocallable Income Strategy ETF (ACII) had 20-Day Historical Volatility (Parkinson) of 0.0322 for 2026-01-08.
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