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.
State Street SPDR Portfolio Nasdaq 100 ETF (QNDX) had 30-Day Historical Volatility (Parkinson) of 0.1510 for 2026-08-17.
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