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 10-20 Year Treasury Bond ETF (TLH) had 30-Day Historical Volatility (Parkinson) of 0.0402 for 2026-01-20.
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