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The stock ABC has a beta of 1.6 and its standard deviation is 30%. Its correlation coefficient with the market return is 0.8. What is the standard deviation of the market return? A. None of the answers is correct B. 18% C. 20% D. 15%

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Answer: D. 15%

Explanation:

Beta is given as 1.6 but is calculable by the formula;

Beta = Correlation Coefficient of stock with market returns * [tex]\frac{Standard Deviation of stock returns}{Standard Deviation of market returns}[/tex]

1.6 = 0.8 * 30%/Sdm

30% /Sdm = 1.6/0.8

30% / Sdm = 2

Sdm * 2 =30%

Sdm = 30%/2

Sdm = 15%

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