Question

In: Finance

2. Calculate the expected return, variance, and standard deviations of stock A, stock B, and obtain...

2. Calculate the expected return, variance, and standard deviations of stock A, stock B, and obtain the expected return of an equally weighted portfolio of both (meaning 50% in A, and 50% in B). Please show all work and formulas used.

Scenario Probability A B
Boom 1/3 -4% 9%
Normal 1/3 8% 4%
Recession 1/3 20% -4%

Solutions

Expert Solution

Answer a.

Stock A:

Expected Return = (1/3) * (-0.04) + (1/3) * 0.08 + (1/3) * 0.20
Expected Return = 0.08 or 8.00%

Variance = (1/3) * (-0.04 - 0.08)^2 + (1/3) * (0.08 - 0.08)^2 + (1/3) * (0.20 - 0.08)^2
Variance = 0.0096

Standard Deviation = (0.0096)^(1/2)
Standard Deviation = 0.0980 or 9.80%

Answer b.

Stock B:

Expected Return = (1/3) * 0.09 + (1/3) * 0.04 + (1/3) * (-0.04)
Expected Return = 0.03 or 3.00%

Variance = (1/3) * (0.09 - 0.03)^2 + (1/3) * (0.04 - 0.03)^2 + (1/3) * (-0.04 - 0.03)^2
Variance = 0.002867

Standard Deviation = (0.002867)^(1/2)
Standard Deviation = 0.0535 or 5.35%

Answer c.

Boom:

Expected Return = 0.50 * (-0.04) + 0.50 * 0.09
Expected Return = 0.025

Normal:

Expected Return = 0.50 * 0.08 + 0.50 * 0.04
Expected Return = 0.06

Recession:

Expected Return = 0.50 * 0.20 + 0.50 * (-0.04)
Expected Return = 0.08

Expected Return of Portfolio = (1/3) * 0.025 + (1/3) * 0.06 + (1/3) * 0.08
Expected Return of Portfolio = 0.055 or 5.50%

Variance of Portfolio = (1/3) * (0.025 - 0.055)^2 + (1/3) * (0.06 - 0.055)^2 + (1/3) * (0.08 - 0.055)^2
Variance of Portfolio = 0.000517

Standard Deviation of Portfolio = (0.000517)^(1/2)
Standard Deviation of Portfolio = 0.0227 or 2.27%


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