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.
Defiance Nasdaq 100 Weekly Distribution ETF (QQQY) had 30-Day Historical Volatility (Parkinson) of 0.0845 for 2026-01-20.
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