Historical Volatility (Parkinson) (10-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.
Fidelity MSCI Health Care Index ETF (FHLC) had 10-Day Historical Volatility (Parkinson) of 0.1128 for 2026-01-20.
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