Historical Volatility (Close-to-Close) (180-Day)
Historical Volatility (Close-to-Close): The past volatility of the security over the selected time frame, calculated using the closing price on each trading day.
Bio-Rad Laboratories, Inc. (BIO) had 180-Day Historical Volatility (Close-to-Close) of 0.3937 for 2026-10-19.
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