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.
ETRACS Crude Oil Shares Covered Call ETN (USOI) had 20-Day Historical Volatility (Parkinson) of 0.1579 for 2026-01-20.
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