Reference no: EM131028961
Scenario: Welte Mutual Funds, Inc., is located in New York City. Welte just obtained $150,000 by converting industrial bonds to cash and is now looking for other investment opportunities for these funds. Based on Welte's current investments, the firm's top financial analyst recommends that all new investments be made in the oil industry, in the steel industry, or in government bonds. Specifically, the analyst identified five investment opportunities and projected their annual rates of return. The investments and rates of return are shown in the table.
Investment Opportunities:
Investment Projected Rate of Return (%)
Atlantic Oil 6.8
Pacific Oil 10.1
Midwest Steel 6.3
Huber Steel 7.2
Government bonds 4.6
The management of Welte imposed the following investment guidelines:
1. No more than 50% of the total funds invested in stock (oil and steel) may be invested in the oil industry, and no more than 50% of the funds invested in stock (oil and steel) may be invested in the steel industry.
2. Government bonds should be at least 20% of the steel industry investments.
3. The investment in Pacific Oil, the high-return but high-risk investment, cannot be more than 60% of the total oil industry investment.
(a) Formulate the linear programming model. What fraction of the portfolio should be invested in each type of security?
Let A = the fraction or proportion of the total investment placed in Atlantic Oil
P = the fraction or proportion of the total investment placed in Pacific Oil
M = the fraction or proportion of the total investment placed in Midwest Steel
H = the fraction or proportion of the total investment placed in Huber Steel
G = the fraction or proportion of the total investment placed in government bonds
Objective function =
Atlantic Oil =
Pacific Oil =
Midwest Steel =
Huber Steel =
Government Bonds =
(b) How much should be invested in each type of security?
Atlantic Oil = $
Pacific Oil = $
Midwest Steel = $
Huber Steel = $
Government Bonds = $
(c) What are the total earnings for the portfolio?
(d) What is the marginal rate of return on the portfolio? That is, how much more could be earned by investing one more dollar in the portfolio?
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