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REALIZED RATES OF RETURNStocks A and B have the following historical returns:YearStock A's Returns, rAStock B's Returns, rB2011- 15.90%- 16.50%201233.5021.20201311.2531.602014- 6.00- 8.80201534.0029.35Calculate the average rate of return for stock A during theperiod 2011 through 2015. Round your answer to two decimalplaces.%Calculate the average rate of return for stock B during the period2011 through 2015. Round your answer to two decimal places.%Assume that someone held a portfolio consisting of 50% of StockA and 50% of Stock B. What would the realized rate of return on theportfolio have been each year? Round your answers to two decimalplaces. Enter a negative answer with a minus sign.YearPortfolio2011%2012 2013 2014 2015 What would the average return on the portfolio have been duringthis period? Round your answer to two decimal places.%Calculate the standard deviation of returns for each stock andfor the portfolio. Round your answers to two decimal places.Stock AStock BPortfolioStandard Deviation%%%Calculate the coefficient of variation for each stock and forthe portfolio. Round your answers to two decimal places.Stock AStock BPortfolioCVAssuming you are a risk-averse investor, would you prefer tohold Stock A, Stock B, or the portfolio? _____