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.
ProShares Decline of the Retail Store ETF (EMTY) had 90-Day Historical Volatility (Parkinson) of 0.1686 for 2026-01-16.
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