Historical Volatility (Parkinson) (90-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.
Defiance Nasdaq 100 Weekly Distribution ETF (QQQY) had 90-Day Historical Volatility (Parkinson) of 0.1099 for 2026-01-20.
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