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Using the Excel file containing the S&P 500 index from the end of 1990 to the end of June 2022 below, calculate the historical daily
Using the Excel file containing the S&P 500 index from the end of 1990 to the end of June 2022 below, calculate the historical daily volatility during the period from 1991 to 2020, and calculate the annual volatility assuming that daily movements in prices are independent of each other. Based on the results, explain briefly how usual/unusual was the year 2021.
SP500
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