Question

State of Economy Probability of State of Economy Rate of Return If State Occurs Stock K...

State of Economy

Probability of State of Economy

Rate of Return If State Occurs

Stock K

Stock M

Boom

0.10

25%

18%

Growth

0.20

10%

20%

Normal

0.50

15%

4%

Recession

0.20

-12%

0%

  1. An individual plans to invest $5,000: $3,000 in Stock K and $2,000 in Stock M. What are the stock weights for this portfolio? (wK = 60%, wM = 40%)
  2. Using the weights computed in Part a, what is the expected return for the portfolio? (E(Rp) = 8.88%)
  3. Using the weights computed in Part a, calculate the variance and standard deviation of the portfolio. (σ²p = 0.7618% , σp = 8.73%)

PLEASE show your work by hand (no excel)

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Answer #1

(a): wK = 3000/5000 = 60% and wM = 2000/5000 = 40%

(b): Expected return = weighted return of K + weighted return of M

= 0.6*(0.1*25%+0.2*10%+0.5*15%+0.2*-12%) + 0.4*(0.1*18%+0.2*20%+0.5*4%+0.2*0%)

= 5.76%+3.12

= 8.88%

(c): Boom Erp = 0.6*25% + 0.4*18% = 22.2%

Growth Erp = 0.6*10%+0.4*20% = 14%

Normal Erp = 0.6*15%+0.4*4% = 10.6%

Recession Erp = 0.6*-12%+0.4*0% = -7.2%

Variance = 0.1*(22.2%-8.88%)^2 + 0.2*(14%-8.88%)^2 + 0.5*(10.6%-8.88%)^2+0.2*(-7.2%-8.88%)^2

= 0.1774%+0.0524%+0.0148%+0.5171%

= 0.7618

Standard deviation = 0.7618%^(1/2) = 0.873 or 8.73%

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