Historical Volatility (Parkinson) (30-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.
iShares Top 20 U.S. Stocks ETF (TOPT) had 30-Day Historical Volatility (Parkinson) of 0.1219 for 2025-05-30.
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