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q140 Q.21. An investor holds shares in A Ltd. and B Ltd. in equal proportion with the following risk and return characteristics: Shares in A Shares in B Expected return (%) 24 19 Standard Deviation (%) 28 23 The returns of these securities have a positive correlation of 0.6. You are required to calculate the portfolio return and risk. Further, suppose that the investor wants to reduce the portfolio risk to 15%. How much should the correlation coefficient be to bring the portfolio risk to the desired level