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.
FT Vest U.S. Equity Moderate Buffer ETF - May (GMAY) had 120-Day Historical Volatility (Parkinson) of 0.0803 for 2026-09-02.
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