Question 2 (20 marks) You are working for a fund that invests actively in different investment...
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Question 2 (20 marks) You are working for a fund that invests actively in different investment sectors. Analysts at your firm have produced the following estimates of sector portfolio (annualized) return variance-covariance matrix from historical data: Consumer sector Industrial sector Technology sector Services sector Consumer sector 0.3 0.2 0.3 0.1 Industrial sector 0.2 0.4 0.3 0.2 Technology sector 0.3 0.3 0.6 0.2 Services sector 0.1 0.2 0.2 0.3 Assume that the risk-free rate is 2% per annum and that your firm can short-sell as well as buy any sector portfolios and the risk-free asset. Your firm does not trust numerical optimizers such as Excel Solver and demands analytical solutions. a) Analysts at your firm have also estimated the following annualized historical average returns: Average return p.a. Consumer sector 10% Industrial sector 10% Technology sector 10% Services sector 10% John believes that the historical estimates above are representative of the forward- looking estimates of return covariances and expected returns. John wishes to get an expected return of 8% by forming a portfolio of the four sectors and the risk-free asset. What is the minimum return standard deviation that John must bear given his beliefs? Show your workings. (6 marks) b) Another fund manager, Paul, after reviewing John's portfolio, expresses concern that the portfolio involves short-selling certain sectors and putting large weights on other sectors. He suggests that modifying the variance-covariance matrix by reducing the magnitude of the off-diagonal terms from the historical estimates would result in a less extreme portfolio than John's portfolio in part a). Do you agree? Why or why not? Explain in words without any calculation. (2 marks) Question 2 (20 marks) You are working for a fund that invests actively in different investment sectors. Analysts at your firm have produced the following estimates of sector portfolio (annualized) return variance-covariance matrix from historical data: Consumer sector Industrial sector Technology sector Services sector Consumer sector 0.3 0.2 0.3 0.1 Industrial sector 0.2 0.4 0.3 0.2 Technology sector 0.3 0.3 0.6 0.2 Services sector 0.1 0.2 0.2 0.3 Assume that the risk-free rate is 2% per annum and that your firm can short-sell as well as buy any sector portfolios and the risk-free asset. Your firm does not trust numerical optimizers such as Excel Solver and demands analytical solutions. a) Analysts at your firm have also estimated the following annualized historical average returns: Average return p.a. Consumer sector 10% Industrial sector 10% Technology sector 10% Services sector 10% John believes that the historical estimates above are representative of the forward- looking estimates of return covariances and expected returns. John wishes to get an expected return of 8% by forming a portfolio of the four sectors and the risk-free asset. What is the minimum return standard deviation that John must bear given his beliefs? Show your workings. (6 marks) b) Another fund manager, Paul, after reviewing John's portfolio, expresses concern that the portfolio involves short-selling certain sectors and putting large weights on other sectors. He suggests that modifying the variance-covariance matrix by reducing the magnitude of the off-diagonal terms from the historical estimates would result in a less extreme portfolio than John's portfolio in part a). Do you agree? Why or why not? Explain in words without any calculation. (2 marks)
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a The minimum return standard deviation that John must bear given his beliefs is 2 This can be calcu... View the full answer
Related Book For
Supply Chain Network Design Applying Optimization and Analytics to the Global Supply Chain
ISBN: 978-0133017373
1st edition
Authors: Michael Watson, Sara Lewis, Peter Cacioppi, Jay Jayaraman
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