In: Operations Management
Blair & Rosen, Inc. (B&R) is a brokerage firm that specializes in investment portfolios designed to meet the specific risk tolerances of its clients. A client who contacted B&R this past week has a maximum of $55,000 to invest. B&R's investment advisor decides to recommend a portfolio consisting of two investment funds: an Internet fund and a Blue Chip fund. The Internet fund has a projected annual return of 17%, while the Blue Chip fund has a projected annual return of 8%. The investment advisor requires that at most $25,000 of the client's funds should be invested in the Internet fund. B&R services include a risk rating for each investment alternative. The Internet fund, which is the more risky of the two investment alternatives, has a risk rating of 5 per thousand dollars invested. The Blue Chip fund has a risk rating of 4 per thousand dollars invested. For example, if $10,000 is invested in each of the two investment funds, B&R's risk rating for the portfolio would be 5(10) + 5(10) = 100. Finally, B&R developed a questionnaire to measure each client's risk tolerance. Based on the responses, each client is classified as a conservative, moderate, or aggressive investor. Suppose that the questionnaire results classified the current client as a moderate investor. B&R recommends that a client who is a moderate investor limit his or her portfolio to a maximum risk rating of 240.
(a) |
Formulate a linear programming model to find the best investment strategy for this client. |
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If required, round your answers to two decimal places. |
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(b) |
Build a spreadsheet model and solve the problem using Solver. What is the recommended investment portfolio for this client? |
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What is the annual return for the portfolio? |
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(c) |
Suppose that a second client with $55,000 to invest has been classified as an aggressive investor. B&R recommends that the maximum portfolio risk rating for an aggressive investor is 350. What is the recommended investment portfolio for this aggressive investor? |
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(d) |
Suppose that a third client with $55,000 to invest has been classified as a conservative investor. B&R recommends that the maximum portfolio risk rating for a conservative investor is 150. Develop the recommended investment portfolio for the conservative investor. |
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(a) Formulation:
Maximize = 0.17I + 0.08B (annual return)
Subject to,
I + B < = 55,000 (maximum investment amount)
I <= 25,000 (Internet Investment Fund)
0.005I + 0.004B <= 240 (risk raking)
I,B >= 0
(b) Solution
Formulae:
Solver Parameters:
(c) Solution
(d) Solution
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