Historical Volatility (Parkinson) (120-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.
Simplify US Equity PLUS Downside Convexity ETF (SPD) had 120-Day Historical Volatility (Parkinson) of 0.1179 for 2026-01-20.
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