You are trying to build the best possible risky portfolio for your investment clients. You have two risky assets available to you: A risky stock with an expected excess return of 0.281 and a standard deviation of 0.83, and a risky bond with an expected excess return of 0.078, and a standard deviation of 0.816. If these two assets have a coefficient of correlation of 0.23, what proportion of the money you invest in risky assets should you put in the bond? An answer of 0 means invest no money in the bond, an answer of 1 means put all of your money in the bond. Please give your answer to three decimal places.
Portfolio invested in stock = (SD of Bond^2 - correlation * SD of stock * SD of bond) / (SD of stock ^ 2 + SD of bond^2 - 2 * correlation*SD of Stock * SD of Bond)
Portfolio invested in stock = (0.816^2 - 0.23 * 0.816 * 0.83) / (0.83^ 2 + 0.816^2 - 2 * 0.23*0.816* 0.83)
Portfolio invested in stock = 0.5101 / 1.043207
Portfolio invested in stock = 0.489
Portfolio invested in Bond = 1 - portfolio invested in stock = 1 - 0.489
Portfolio invested in Bond = 0.511
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