Question

In: Operations Management

Linear Programming / Excel Solver MJ Investments manages money for a variety of companies. It has...

Linear Programming / Excel Solver

MJ Investments manages money for a variety of companies. It has three primary investments that it uses: The bonds return 4%, the traditional stock funds return 9%, and the growth stocks return 14%. The company always invests at least 20% of its portfolio in bonds. It also wants to invest at least twice as much in traditional stocks as it does in growth stocks. If the company has $2,000,000 to invest, how should it break down the investment in order to maximize return?

Solutions

Expert Solution

Let the amount invested in traditional stock be Xt, in growth stock be Xg, Bonds be Xb

Total Returns = 0.04*Xb + 0.09*Xt + 0.14*Xg

We have to maximize these returns

Subject to Constraints

Xb + Xt + Xg <= 2,000,000................Constraint for the amount available for investment

Xb >= 20% * (Xb + Xt + Xg)...............Constraint for a minimum amount in bonds

Xt >= 2*Xg..........................................Constraint for investing twice as much in traditional as a growth stock

Xb, Xt, Xg >= 0....................................Non-negativity constraint as the amount invested cannot be negative

We solve the above LPP in Excel using Excel Solver as shown below:

The above solution in the form of formulas along with Excel Solver extract is shown below for better understanding and reference:

The investment break-up is:

Bonds = 400,000

Traditional stocks = 1,066,666.67

Growth Stocks = 533,333.33

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