Question

Consider the following possible outcomes for the economy (first column) with the associated probabilities (second column)...

Consider the following possible outcomes for the economy (first column) with the associated probabilities (second column) and the return of stock A for the different states of the world. Outcome Probability Return Recession 25% -30% Expansion 40% 15% Boom 35% 55% What is the expected variance of stock A?

a.

11%

b.

6%

c.

29%

Homework Answers

Answer #1

Correct answer is option (a). 11%

Explanation;

Condition

Probability

Return

Expected return (Probabilty * Return)

Recession

0.25

- 30%

- 7.5%

Expansion

0.40

15%

6%

Boom

0.35

55%

19.25%

Expected return

17.75%

Probability

Return

Deviation from Expected Value

Square

Probability * Square

0.25

- 30%

(-.30 – .1775) = - .4775

0.2280

0.057

0.40

15%

(.15 – .1775) = - .0275

0.00076

0.000304

0.35

55%

(.55 – .1775) = .3725

0.1387

0.0485

Variance

0.1059

Variance is 10.59% (Approx.) OR 11%

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