Historical Volatility (Close-to-Close) (30-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.
The Materials Select Sector SPDR Premium Income Fund (XLBI) had 30-Day Historical Volatility (Close-to-Close) of 0.0990 for 2025-09-23.
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