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.
iShares iBonds Dec 2027 Term Treasury ETF (IBTH) had 20-Day Historical Volatility (Parkinson) of 0.0056 for 2026-01-20.
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