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.
ProShares Decline of the Retail Store ETF (EMTY) had 30-Day Historical Volatility (Parkinson) of 0.1526 for 2025-05-30.
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