Historical Volatility (Parkinson) (60-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.
Natural Grocers by Vitamin Cottage, Inc. (NGVC) had 60-Day Historical Volatility (Parkinson) of 0.4505 for 2025-08-01.
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