Observe the following returns over time:
Year: Stock A: Market:
2014 18% 14%
2015 6% 8%
2016 23% 12%
Assume that the risk-free rate is 6% and the market risk premium is 5%.
a) What are the expected rates of return on Stock A and the market?
b) What is the standard deviation on Stock A and the market?
c) What is the Beta for Stock X given a correlation to the market of 0.8117? Is Stock A more or less risky than the market?
d) What is the rate of return on a portfolio with 80% Stock A and 20% of Stock B (where Stock B has a Beta of 1.5)?
a. Expected Return of Stock A = (18 + 6 + 23) / 3 = 15.67%
Expected Return of Market = (14 + 8 + 12) / 3 = 11.33%
b. Standard deviation of Stock
Standard deviation of Stock = 7.13%
Standard Deviation of Market
Standard Deviation of Market = 2.49%
c. Beta of Stock X = Standard deviation of Stock * Correlation / Standard deviation of Market
Beta of Stock X = 7.13 * 0.8117 / 2.49
Beta of Stock X = 2.32
The Beta of market is always 1 and the beta of stock x is 2.32 which is very risky when compared with marrket.
d. Return of Stock B = 1.5 * 5 + 6 = 13.5 %
Rate of return on a portfolio = 13.5% * 0.2 + 15.67% * 0.8
Rate of return on a portfolio = 15.24%
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