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Ch 25 Portfolio Theory and Asset Pricing Models
1. The slope of the SML is determined by the value of beta.
a.
True
b.
False
2. If you plotted the returns of Selleck & Company against those of the market and found that the slope of your line was
negative, the CAPM would indicate that the required rate of return on Selleck's stock should be less than the risk-free rate
for a well-diversified investor, assuming that the observed relationship is expected to continue in the future.
a.
True
b.
False
Ch 25 Portfolio Theory and Asset Pricing Models
3. The SML relates required returns to firms' systematic (or market) risk. The slope and intercept of this line can be
influenced by managerial actions.
a.
True
b.
False
4. The Y-axis intercept of the SML indicates the return on an individual asset when the realized return on an average (b =
1) stock is zero.
a.
True
b.
False
Ch 25 Portfolio Theory and Asset Pricing Models
5. Which of the following statements is CORRECT?
a.
The slope of the CML is ( M − rRF)/bM.
b.
All portfolios that lie on the CML to the right of σM are inefficient.
c.
All portfolios that lie on the CML to the left of σM are inefficient.
d.
The slope of the CML is ( M − rRF)/σM.
e.
The Capital Market Line (CML) is a curved line that connects the risk-free rate and the market portfolio.
6. Stock A has an expected return rA = 10% and σA = 10%. Stock B has rB = 14% and σB = 15%. rAB = 0. The rate of
return on riskless assets is 6%.
a.
Construct a graph that shows the feasible and efficient sets, giving consideration to the
existence of the riskless asset.
b.
Explain what would happen to the CML if the two stocks had (a) a positive correlation
coefficient or (b) a negative correlation coefficient.
c.
Suppose these were the only three securities (A, B, and riskless) in the economy, and
everyone's indifference curves were such that they were tangent to the CML to the right of
the point where the CML was tangent to the efficient set of risky assets. Would this represent
a stable equilibrium? If not, how would an equilibrium be produced?
Ch 25 Portfolio Theory and Asset Pricing Models
Ch 25 Portfolio Theory and Asset Pricing Models
7. If the returns of two firms are negatively correlated, then one of them must have a negative beta.
a.
True
b.
False
Ch 25 Portfolio Theory and Asset Pricing Models
8. A stock with a beta equal to −1.0 has zero systematic (or market) risk.
a.
True
b.
False
9. It is possible for a firm to have a positive beta, even if the correlation between its returns and those of another firm are
negative.
a.
True
b.
False
Ch 25 Portfolio Theory and Asset Pricing Models
10. In portfolio analysis, we often use ex post (historical) returns and standard deviations, despite the fact that we are
interested in ex ante (future) data.
a.
True
b.
False
11. We will almost always find that the beta of a diversified portfolio is less stable over time than the beta of a single
security.
a.
True
b.
False
Ch 25 Portfolio Theory and Asset Pricing Models
12. You have the following data on three stocks:
Stock
Standard Deviation
Beta
A
0.15
0.79
B
0.25
0.61
C
0.20
1.29
As a risk minimizer, you would choose Stock ____ if it is to be held in isolation and Stock ____ if it is to be held as part
of a well-diversified portfolio.
a.
A; B.
b.
B; C.
c.
C; A.
d.
C; B.
e.
A; A.
Ch 25 Portfolio Theory and Asset Pricing Models
13. Which is the best measure of risk for an asset held in isolation, and which is the best measure for an asset held in a
diversified portfolio?
a.
Standard deviation; correlation coefficient.
b.
Beta; variance.
c.
Coefficient of variation; beta.
d.
Beta; beta.
e.
Variance; correlation coefficient.
14. Which of the following is NOT a potential problem with beta and its estimation?
a.
Sometimes, during a period when the company is undergoing a change such as toward more leverage or riskier
assets, the calculated beta will be drastically different than the "true" or "expected future" beta.
b.
The beta of "the market," can change over time, sometimes drastically.
c.
Sometimes the past data used to calculate beta do not reflect the likely risk of the firm for the future because
conditions have changed.
d.
There is a wide confidence interval around a typical stock's estimated beta.
e.
Sometimes a security or project does not have a past history which can be used as a basis for calculating beta.
Ch 25 Portfolio Theory and Asset Pricing Models
15. Stock A's beta is 1.5 and Stock B's beta is 0.5. Which of the following statements must be true about these securities?
(Assume market equilibrium.)
a.
Stock B must be a more desirable addition to a portfolio than Stock A.
b.
Stock A must be a more desirable addition to a portfolio than Stock B.
c.
The expected return on Stock A should be greater than that on Stock B.
d.
The expected return on Stock B should be greater than that on Stock A.
e.
When held in isolation, Stock A has greater risk than Stock B.
16. In a portfolio of three different stocks, which of the following could NOT be true?
a.
The riskiness of the portfolio is greater than the riskiness of one or two of the stocks.
b.
The beta of the portfolio is less than the betas of each of the individual stocks.
c.
The beta of the portfolio is greater than the beta of one or two of the individual stocks' betas.
d.
The beta of the portfolio cannot be equal to 1.
e.
The riskiness of the portfolio is less than the riskiness of each of the stocks if they were held in isolation.
Ch 25 Portfolio Theory and Asset Pricing Models
17. You have the following data on (1) the average annual returns of the market for the past 5 years and (2) similar
information on Stocks A and B. Which of the possible answers best describes the historical betas for A and B?
Years
Market
Stock A
Stock B
1
0.03
0.16
0.05
2
−0.05
0.20
0.05
3
0.01
0.18
0.05
4
−0.10
0.25
0.05
5
0.06
0.14
0.05
a.
bA > +1; bB = 0.
b.
bA = 0; bB = −1.
c.
bA < 0; bB = 0.
d.
bA < −1; bB = 1.
e.
bA > 0; bB = 1.
Ch 25 Portfolio Theory and Asset Pricing Models
18. Which of the following statements is CORRECT?
a.
The typical R2 for a stock is about 0.94 and the typical R2 for a portfolio is about 0.6.
b.
The typical R2 for a stock is about 0.3 and the typical R2 for a large portfolio is about 0.94.
c.
The typical R2 for a stock is about 0.94 and the typical R2 for a portfolio is also about 0.94.
d.
The typical R2 for a stock is about 0.6 and the typical R2 for a portfolio is also about 0.6.
e.
The typical R2 for a stock is about 0.3 and the typical R2 for a portfolio is also about 0.3.
19. Which of the following statements is CORRECT?
a.
The characteristic line is the regression line that results from plotting the returns on a particular stock versus
the returns on a stock from a different industry.
b.
The slope of the characteristic line is the stock's standard deviation.
c.
The distance of the plot points from the characteristic line is a measure of the stock's market risk.
d.
The distance of the plot points from the characteristic line is a measure of the stock's diversifiable risk.
e.
"Characteristic line" is another name for the Security Market Line.
Ch 25 Portfolio Theory and Asset Pricing Models
20. You hold a portfolio consisting of a $5,000 investment in each of 20 different stocks. The portfolio beta is equal to
1.12. You have decided to sell a coal mining stock (b = 1.00) at $5,000 net and use the proceeds to buy a like amount of a
mineral rights company stock (b = 2.00). What is the new beta of the portfolio?
a.
1.1139
b.
1.1700
c.
1.2311
d.
1.2927
e.
1.3573
Ch 25 Portfolio Theory and Asset Pricing Models
21. Your mother's well-diversified portfolio has an expected return of 12.0% and a beta of 1.20. She is in the process of
buying 100 shares of Safety Corp. at $10 a share and adding it to her portfolio. Safety has an expected return of 15.0%
and a beta of 2.00. The total value of your current portfolio is $9,000. What will the expected return and beta on the
portfolio be after the purchase of the Safety stock?
rp bp
a.
11.69%; 1.22
b.
12.30%; 1.28
c.
12.92%; 1.34
d.
13.56%; 1.41
e.
14.24%; 1.48
