Historical Volatility (Close-to-Close) (150-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.
ACI Worldwide, Inc. (ACIW) had 150-Day Historical Volatility (Close-to-Close) of 0.3877 for 2026-07-21.
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