1. Consider n risky assets with expected returns F1, F2, Fn. Let F= (F1,F2,,Fn) be the...
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1. Consider n risky assets with expected returns F1, F2, Fn. Let F= (F1,F2,,Fn) be the column vector of expected returns, rj be the risk-free rate, e be an n x 1 vector of ones, b= F-rje be the vector of expected excess returns, and V denote the variance- covariance matrix. For any portfolio Tp, let qp = b'p denote the expected excess return of portfolio Tp, let o2 = Vp denote the variance of the return of portfolio #p, and let Sp denote the Sharpe ratio of portfolio Tp. Finally, for any two portfolios ₂ and Ts, let Ops =Vs denote the covariance between the returns of these portfolios. Let Op V-¹6 e'V-16 πb = (i) For any portfolio #p, let Bp = . This is the beta of portfolio ₂ relative to portfolio T. Show that Sp ≤ Sb. [10 marks] (ii) Support that St = 0.8, and that for some portfolio #p, the expected return and the standard deviation of the portfolio are fp = 15% and op = 25%, respectively. Furthermore, assume that f = 5%. Compute Sp. What is the correlation of portfolios ₂ and ₂? [5 marks] 1. Consider n risky assets with expected returns F1, F2, Fn. Let F= (F1,F2,,Fn) be the column vector of expected returns, rj be the risk-free rate, e be an n x 1 vector of ones, b= F-rje be the vector of expected excess returns, and V denote the variance- covariance matrix. For any portfolio Tp, let qp = b'p denote the expected excess return of portfolio Tp, let o2 = Vp denote the variance of the return of portfolio #p, and let Sp denote the Sharpe ratio of portfolio Tp. Finally, for any two portfolios ₂ and Ts, let Ops =Vs denote the covariance between the returns of these portfolios. Let Op V-¹6 e'V-16 πb = (i) For any portfolio #p, let Bp = . This is the beta of portfolio ₂ relative to portfolio T. Show that Sp ≤ Sb. [10 marks] (ii) Support that St = 0.8, and that for some portfolio #p, the expected return and the standard deviation of the portfolio are fp = 15% and op = 25%, respectively. Furthermore, assume that f = 5%. Compute Sp. What is the correlation of portfolios ₂ and ₂? [5 marks]
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Related Book For
Differential Equations and Linear Algebra
ISBN: 978-0131860612
2nd edition
Authors: Jerry Farlow, James E. Hall, Jean Marie McDill, Beverly H. West
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