Problem 8-11 The employee credit union at State University is planning the alloc
ID: 2746581 • Letter: P
Question
Problem 8-11 The employee credit union at State University is planning the allocation of funds for the coming year. The credit union makes four types of loans to its members. In addition, the credit union invests in risk-free securities to stabilize income. The various revenue-producing investments together with annual rates of return are as follows:
Type of Loan/Investment Annual Rate of Return (%)
Automobile loans 7
Furniture loans 10
Other secured loans 11
Signature loans 12
Risk-free securities 8
The credit union will have $2 million available for investment during the coming year. State laws and credit union policies impose the following restrictions on the composition of the loans and investments:
• Risk-free securities may not exceed 30% of the total funds available for investment.
• Signature loans may not exceed 10% of the funds invested in all loans (automobile, furniture, other secured, and signature loans).
• Furniture loans plus other secured loans may not exceed the automobile loans.
• Other secured loans plus signature loans may not exceed the funds invested in risk-free securities.
How should the $2 million be allocated to each of the loan/investment alternatives to maximize total annual return?
Type of Loan/Investment Fund Allocation
Automobile loans $
Furniture loans $
Other secured loans $
Signature loans $
Risk-free securities $
What is the projected total annual return?
Annual Return = $
Explanation / Answer
Let
x1 = $ automobile loans
x2 = $ furniture loans
x3 = $ other secured loans
x4 = $ signature loans
x5 = $ "risk free" securities
Max 0.07x1 + 0.10x2 + 0.11x3 + 0.12x4 + 0.08x5
s.t. x5 600,000 .........................................................................................[1]
x4 0.10(x1 + x2 + x3 + x4) or -0.10x1 - 0.10x2 - 0.10x3 + 0.90x4 0 ....... [2]
x2 + x3 x1 or - x1 + x2 + x3 0 ........................................................... [3]
x3 + x4 x5 or + x3 + x4 - x5 0 .............................................................[4]
x1 + x2 + x3 + x4 + x5 = 2,000,000 .........................................................[5]
x1, x2, x3, x4, x5 0
Optimal solution:
Automobile Loans (x1) = $630,000
Furniture Loans (x2) = $170,000
Other Secured Loans (x3) = $460,000
Signature Loans (x4) = $140,000
Risk Free Loans (x5) = $600,000
The projected total annual return
= (0.07*630000) + (0.1*170000) + (0.11*460000) + (0.12*140000) + (0.08*600000)
= 44100 + 17000 + 50600 + 16800 + 48000
= $176,500 (8.825%)
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