投资学第7版TestBank答案07

1、本文档如对你有帮助，请帮忙下载支持！Multiple Choice Questions1.Market risk is also referred to asA)B)C)D)E)2.3.firm specific risk. beta. systematic risk. market risk. none of the above.Answer: A Difficulty: EasyRationale: See explanations for 1 and 2 above.The variance of a portfolio of risky securitiesA)B)C)D)E)4.A)

2、B)C)D)E)Answer: A Difficulty: Easysecurities returns are uncorrelated. securities returns are positively correlated. securities returns are high.securities returns are negatively correlated. B and C.systematic risk, diversifiable risk. systematic risk, nondiversifiable risk. unique risk, nondiversif

3、iable risk. unique risk, diversifiable risk. none of the above.Answer: B Difficulty: EasyRationale: Market, systematic, and nondiversifiable risk are synonyms referring to the risk that cannot be eliminated from the portfolio. Diversifiable, unique, nonsystematic, and firm-specific risks are synonym

4、s referring to the risk that can be eliminated from the portfolio by diversification.The risk that can be diversified away isA)B)C)D)E) is a weighted sum of the securities variances.is the sum of the securities variances.is the weighted sum of the securities variances and covariances. is the sum of

5、the securities covariances.none of the above.Answer: C Difficulty: ModerateRationale: The variance of a portfolio of risky securities is a weighted sum taking into account both the variance of the individual securities and the covariances between securities.The expected return of a portfolio of risk

6、y securitiesis a weighted average of the securities returns.is the sum of the securities returns.is the weighted sum of the securities variances and covariances.A and C.none of the above.Other things equal, diversification is most effective whenA)B)C)D)Answer: D Difficulty: ModerateRationale: Negati

7、ve correlation among securities results in the greatest reduction ofE)5.6.7.8.the portion of the investment opportunity set that lies above the global minimum variance portfolio.the portion of the investment opportunity set that represents the highest standard deviations.the portion of the investmen

8、t opportunity set which includes the portfolios with the lowest standard deviation.the set of portfolios that have zero standard deviation. both A and B are true.B)C)D)E)Answer: C Difficulty: ModerateRationale: The Capital Allocation Line represents the most efficient combinations of the risk-free a

9、sset and risky securities. Only C meets that definition.Consider an investment opportunity set formed with two securities that are perfectly negatively correlated. The global minimum variance portfolio has a standard deviation that is alwaysA)B)C)D)E)The higher the coefficient of correlation between

10、 securities, the greater the reduction in the portfolio variance.There is a linear relationship between the securities coefficient of correlation and the portfolio variance.The degree to which the portfolio variance is reduced depends on the degree ofB)C)本文档如对你有帮助，请帮忙下载支持！ portfolio risk, which is t

11、he goal of diversification. The efficient frontier of risky assets isA)D)E)Answer: A Difficulty: ModerateRationale: Portfolios on the efficient frontier are those providing the greatest expected return for a given amount of risk. Only those portfolios above the global minimum variance portfolio meet

12、 this criterion.A)The Capital Allocation Line provided by a risk-free security and N risky securities is the line that connects the risk-free rate and the global minimum-variance portfolio of the risky securities.B)the line that connects the risk-free rate and the portfolio of the risky securities t

13、hat has the highest expected return on the efficient frontier.C)the line tangent to the efficient frontier of risky securities drawn from the risk-free rate.the horizontal line drawn from the risk-free rate.none of the above.greater than zero.equal to zero.equal to the sum of the securities standard

14、 deviations. equal to -1.none of the above.Answer: B Difficulty: DifficultRationale: If two securities were perfectly negatively correlated, the weights for the minimum variance portfolio for those securities could be calculated, and the standard deviation of the resulting portfolio would be zero.Wh

15、ich of the following statements is (are) true regarding the variance of a portfolio of two risky securities?A)9.本文档如对你有帮助，请帮忙下载支持！correlation between securities.D) A and B.E) A and C.Answer: C Difficulty: ModerateRationale: The lower the correlation between the returns of the securities, the more po

16、rtfolio risk is reduced.are formed with the securities that have the highest rates of return regardless of their standard deviations.have the highest rates of return for a given level of risk.are selected from those securities with the lowest standard deviations regardless of their returns.have the

17、highest risk and rates of return and the highest standard deviations. have the lowest standard deviations and the lowest rates of return.10. Efficient portfolios of N risky securities are portfolios thatB)C)A)D)E)Answer: B Difficulty: ModerateRationale: Portfolios that are efficient are those that p

18、rovide the highest expected return for a given level of risk.Less risk-averse investors will invest more in the risk-free security and less in the optimal risky portfolio than more risk-averse investors.More risk-averse investors will invest less in the optimal risky portfolio and more in the risk-f

19、ree security than less risk-averse investors.Investors choose the portfolio that maximizes their expected utility.A and C.B and C.11. Which of the following statement(s) is (are) true regarding the selection of a portfolio from those that lie on the Capital Allocation Line?B)A)C)D)E)Answer: E Diffic

20、ulty: ModerateRationale: All rational investors select the portfolio that maximizes their expected utility; for investors who are relatively more risk-averse, doing so means investing less in the optimal risky portfolio and more in the risk-free asset.Use the following to answer questions 12-18:Cons

21、ider the following probability distribution for stocks A and B:, respectively.12. The expected rates of return of stocks A and B are and13.2%; 9% 14%; 10%13.2%; 7.7%7.7%; 13.2% none of the aboveA)B)C)D)Answer: C Difficulty: EasyRationale: E(RA) = 0.1(10%) + 0.2(13%) + 0.2(12%) + 0.3(14%) + 0.2(15%)

22、= 13.2%;E(RB) = 0.1(8%) + 0.2(7%) + 0.2(6%) + 0.3(9%) + 0.2(8%) = 7.7%.13. The standard deviations of stocks A and B are and , respectively.A) 1.5%; 1.9%B) 2.5%; 1.1%C) 3.2%; 2.0%E)本文档如对你有帮助，请帮忙下载支持！14.15.16.D) 1.5%; 1.1% E) none of the above Answer: D Difficulty: ModerateRationale: sA = 0.1(10% - 1

23、3.2%)2 + 0.2(13% - 13.2%)2 + 0.2(12% - 13.2%)2 + 0.3(14% - 13.2%)2 + 0.2(15% - 13.2%)21/2 = 1.5%; sB = 0.1(8% - 7.7%)2 + 0.2(7% - 7.7%)2 + 0.2(6% - 7.7%)2 + 0.3(9% - 7.7%)2 + 0.2(8% - 7.7%)2 = 1.1%. The coefficient of correlation between A and B is A) B) C) D) E)0.47.0.60.0.581.20.none of the above.

24、Answer: A Difficulty: DifficultRationale: covA,B = 0.1(10% - 13.2%)(8% - 7.7%) + 0.2(13% - 13.2%)(7% - 7.7%) + 0.2(12% - 13.2%)(6% - 7.7%) + 0.3(14% - 13.2%)(9% - 7.7%) + 0.2(15% - 13.2%)(8% - 7.7%) = 0.76; rA,B = 0.76/(1.1)(1.5) = 0.47.If you invest 40% of your money in A and 60% in B, what would b

25、e your portfolios expected rate of return and standard deviation?A) B) C) D) E)9.9%; 3%9.9%; 1.1%11%; 1.1%11%; 3%none of the aboveAnswer: B Difficulty: DifficultRationale: E(RP) = 0.4(13.2%) + 0.6(7.7%) = 9.9%; sP = (0.4)2(1.5)2 + (0.6)2(1.1)2 + 2(0.4)(0.6)(1.5)(1.1)(0.46)1/2 = 1.1%.Let G be the glo

26、bal minimum variance portfolio. The weights of A and B in G are and , respectively.A)0.40;0.60B)0.66;0.34C)0.34;0.66D)0.76;0.24E)0.24;0.76Answer: E Difficulty: DifficultRationale: wA = (1.1)2 - (1.5)(1.1)(0.46)/(1.5) 2 + (1.1)2 - (2)(1.5)(1.1)(0.46) = 0.23;wB = 1 - 0.23 = that the above solution ass

27、umes the solutions obtained in question 13 and 14.The expected rate of return and standard deviation of the global minimum variance portfolio, G, are and , respectively.A)B)C)D)E)10.07%; 1.05% 9.04%; 2.03%10.07%; 3.01% 9.04%; 1.05% none of the aboveAnswer: D Difficulty: Moderate17.本文档如对你有帮助，请帮忙下载支持！

28、 Rationale: E(RG) = 0.23(13.2%) + 0.77(7.7%) = 8.97% . 9%; sG = (0.23)2(1.5)2 + (0.77)2(1.1)2 + (2)(0.23)(0.77)(1.5)(1.1)(0.46)1/2 = 1.05%.18. Which of the following portfolio(s) is (are) on the efficient frontier?A)B)C)D)E)The weights of A and B in the global minimum variance portfolio are respecti

29、vely.0.24; 0.760.50; 0.500.57; 0.430.43; 0.570.76; 0.24A)B)C)D)E)Answer: D Difficulty: Moderate20.21.8.5%9.0%8.9%9.9%none of the aboveAnswer: C Difficulty: DifficultRationale: E(RP) = 0.43(10%) + 0.57(8%) = 8.86%. Which of the following portfolio(s) is (are) most efficient?A)B)C)D)E)The portfolio wi

30、th 20 percent in A and 80 percent in B. The portfolio with 15 percent in A and 85 percent in B. The portfolio with 26 percent in A and 74 percent in B. The portfolio with 10 percent in A and 90 percent in B. A and B are both on the efficient frontier.Answer: C Difficulty: DifficultRationale: The Por

31、tfolios E(Rp), sp, Reward/volatility ratios are 20A/80B: 8.8%, 1.05%, 8.38; 15A/85B: 8.53%, 1.06%, 8.07; 26A/74B: 9.13%, 1.05%, 8.70; 10A/90B: 8.25%, 1.07%, 7.73. The portfolio with 26% in A and 74% in B dominates all of the other portfolios by the mean-variance criterion.Use the following to answer

32、 questions 19-21:Consider two perfectly negatively correlated risky securities A and B. A has an expected rate of return of 10% and a standard deviation of 16%. B has an expected rate of return of 8% and a standard deviation of 12%.and19.Rationale: wA = 12 /(16 + 12) = 0.4286; wB = 1 - 0.4286 = 0.57

33、14.rate ofThe risk-free portfolio that can be formed with the two securities will earn return.A)B)C)D)E)45 percent in A and 55 percent in B.65 percent in A and 35 percent in B.35 percent in A and 65 percent in B. A and B are both efficient.A and C are both efficient.Answer: D Difficulty: DifficultRa

34、tionale: The Portfolio E(Rp), sp, and Reward/volatility ratios are 45A/55B: 8.9%, 0.6%, 14.83; 65A/35B: 9.3%, 6.2%, 1.5; 35A/65B: 8.7%, 2.2%, 3.95. Both A and B are efficient according to the mean-variance criterion. A has a much higher本文档如对你有帮助，请帮忙下载支持！Reward/volatility ratio.An investor who wishes

35、 to form a portfolio that lies to the right of the optimal risky portfolio on the Capital Allocation Line must:A)22.23.24.25.B)C)D)E)Answer: E Difficulty: ModerateRationale: The only way that an investor can create portfolios to the right of the CapitalOnly portfolio W cannot lie on the efficient fr

36、ontier. Only portfolio X cannot lie on the efficient frontier. Only portfolio Y cannot lie on the efficient frontier. Only portfolio Z cannot lie on the efficient frontier. Cannot tell from the information given.lend some of her money at the risk-free rate and invest the remainder in the optimal ris

37、ky portfolio.borrow some money at the risk-free rate and invest in the optimal risky portfolio. invest only in risky securities.such a portfolio cannot be formed. B and CAllocation Line is to create a borrowing portfolio (buy stocks on margin). In this case, the investor will not hold any of the ris

38、k-free security, but will hold only risky securities. Which one of the following portfolios cannot lie on the efficient frontier as described by Markowitz?A)B)C)D)E)Answer: A Difficulty: ModerateRationale: When plotting the above portfolios, only W lies below the efficient frontier as described by M

39、arkowitz. It has a higher standard deviation than Z with a lower expected return.Which one of the following portfolios cannot lie on the efficient frontier as described by Markowitz?Only portfolio A cannot lie on the efficient frontier.Only portfolio B cannot lie on the efficient frontier.Only portf

40、olio C cannot lie on the efficient frontier.Only portfolio D cannot lie on the efficient frontier.Cannot tell from the information given.A)B)C)D)E)Answer: D Difficulty: ModerateRationale: When plotting the above portfolios, only W lies below the efficient frontier as described by Markowitz. It has a

41、 higher standard deviation than Z with a lower expected return.Portfolio theory as described by Markowitz is most concerned with: A) B) C) D) E)Answer: B Difficulty: ModerateRationale: Markowitz was concerned with reducing portfolio risk by combining risky securities with differing return patterns.T

42、he measure of risk in a Markowitz efficient frontier is:the elimination of systematic risk.the effect of diversification on portfolio risk. the identification of unsystematic risk. active portfolio management to enhance returns. none of the above.27.本文档如对你有帮助，请帮忙下载支持！specific risk. standard deviatio

43、n of returns. reinvestment risk.beta.none of the above.A)B)C)D)E) Answer: B Difficulty: ModerateRationale: Markowitz was interested in eliminating diversifiable risk (and thus lessening total risk) and thus was interested in decreasing the standard deviation of the returns of the portfolio.A statist

44、ic that measures how the returns of two risky assets move together is: A) B) C) D) E)27.28.variance. standard deviation. covariance. correlation.C and D.Answer: E Difficulty: ModerateRationale: Covariance measures whether security returns move together or in opposition; however, only the sign, not t

45、he magnitude, of covariance may be interpreted. Correlation, which is covariance standardized by the product of the standard deviations of the two securities, may assume values only between +1 and -1; thus, both the sign and the magnitude may be interpreted regarding the movement of one securitys re

46、turn relative to that of another security.The unsystematic risk of a specific securityA)B)C)D)E)is likely to be higher in an increasing market. results from factors unique to the firm. depends on market volatility. cannot be diversified away. none of the above.29.C)D)Answer: B Difficulty: ModerateRa

47、tionale: Unsystematic (or diversifiable or firm-specific) risk refers to factors unique to the firm. Such risk may be diversified away; however, market risk will remain. Which statement about portfolio diversification is correct?A) B)Proper diversification can reduce or eliminate systematic risk.The

48、 risk-reducing benefits of diversification do not occur meaningfully until at least 50-60 individual securities have been purchased.Because diversification reduces a portfolios total risk, it necessarily reduces the portfolios expected return.Typically, as more securities are added to a portfolio, t

49、otal risk would be expected to decrease at a decreasing rate.E)Answer: D Difficulty: ModerateRationale: Diversification can eliminate only nonsystematic risk; relatively few securities are required to reduce this risk, thus diminishing returns result quickly. Diversification does not necessarily red

50、uce returns.The individual investors optimal portfolio is designated by:None of the above statements is correct.31.本文档如对你有帮助，请帮忙下载支持！ The point of tangency with the indifference curve and the capital allocation line. The point of highest reward to variability ratio in the opportunity set. The point

51、of tangency with the opportunity set and the capital allocation line. The point of the highest reward to variability ratio in the indifference curve. None of the above.A)B)C)D)E)Answer: A Difficulty: Moderate31.32.33.+1.00.+0.50.0.00.-1.00.none of the above.Answer: D Difficulty: ModerateRationale: T

52、he correlation coefficient of -1.00 provides the greatest diversification benefits.In a two-security minimum variance portfolio where the correlation between securities is greater than -1.0A)B)C)D)E)the business cycle. interest rates. personnel changes the inflation rate. exchange rates.0.01.00.5-1.

53、0Rationale: The indifference curve represents what is acceptable to the investor; the capital allocation line represents what is available in the market. The point of tangency represents where the investor can obtain the greatest utility from what is available. For a two-stock portfolio, what would

54、be the preferred correlation coefficient between the two stocks?A)B)C)D)E)the security with the higher standard deviation will be weighted more heavily. the security with the higher standard deviation will be weighted less heavily. the two securities will be equally weighted.the risk will be zero. t

55、he return will be zero.Answer: B Difficulty: DifficultRationale: The security with the higher standard deviation will be weighted less heavily to produce minimum variance. The return will not be zero; the risk will not be zero unless the correlation coefficient is -1.Which of the following is not a

56、source of systematic risk?A)B)C)D)E)Answer: C Difficulty: EasyRationale: Personnel changes are a firm-specific event that is a component of non-systematic risk. The others are all sources of systematic risk.The global minimum variance portfolio formed from two risky securities will be riskless when the correlation coefficient between the two securities isA)B)C)D)34.本文档如对你有帮助，请帮忙下载支持！35.36.37.0.0380.0700.0180.0130.054Answer: A Difficulty: ModerateRationale: Cov(rX, rY) = (.7)(.20)(.27) = .0378When two risky securities that are positively c