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Subject:
FINANCE
Category: Business and Money Asked by: ginger8-ga List Price: $80.00 |
Posted:
28 Jun 2005 11:49 PDT
Expires: 28 Jul 2005 11:49 PDT Question ID: 537918 |
MUST HAVE ANSWERS TODAY June 28, 2005 by 4:30 pm pacific time. ANSWER THE FOLLOWING: 1. A portfolio that combines the risk free asset and the market portfolio has an expected return of 25% and a standard deviation of 4%. The risk free rate is 5%, and the expected return on the market portfolio is 20%. Assume the capital asset pricing model holds. What expected rate of return would a security earn if it had a 0.5 correlation with the market portfolio and standard deviation of 2%? 2. Johnson paint stock has an expected return of 19% and a beta of 1.7, while Tire stock has an expected return of 14% and a beta of 1.2. Assume the capital asset preicing model holds. What is the expected return on the market? What is the risk free rate? 3. Suppose you have invested $30,000 in the following four stocks: Security Amount Invested Beta Stock A $5,000 0.75 Stock B $10,000 1.1 Stock C $8,000 1.36 Stock D $7,000 1.88 The risk free rate is 4% and the expected return on the market portfolio is 15%. Based on the capital asset pricing model, what is the expected return on the above portfolio? COMMENT ON THE FOLLOWING: 4. Suppose the expected return and standard deviations of stocks A and B are E(R A) = 0.15, and E(R B) = 0.25, ? A = 0.1 and ? B = 0.2 respectively. a. calculate the expected return and standard deviation of a portfolio that is composed of 40% A and 60% B when the correlation between the returns on A and B is 0.5. b. calculate the standard deviation of a portfolio that is composed of 40% A and 60% B when the correlation coefficient between the returns on A and B is -0.5. c. how does the correlation between the returns on A and B affect the standard deviation o the portfolio? 5. You enter into a forward contract to buy a 10-year, zero-coupon bond that will be issued in one year.The face value of the bond is $1,000, and the 1-year and 11-year spot interest rates are 3 percent per annum and 8 percent per annum, respectively. Both of these interest rates are expressed as effective annual yields (EAYs). a. What is the forward price of your contract? b. Suppose both the 1-year and 11-year spot rates unexpectedly shift downward by 2 percent. What is the price of a forward contract otherwise identical to yours? | |
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Subject:
Re: FINANCE
Answered By: livioflores-ga on 28 Jun 2005 16:49 PDT |
Hi!! 1. A portfolio that combines the risk free asset and the market portfolio has an expected return of 25% and a standard deviation of 4%. The risk free rate is 5%, and the expected return on the market portfolio is 20%. Assume the capital asset pricing model holds. What expected rate of return would a security earn if it had a 0.5 correlation with the market portfolio and standard deviation of 2%? First, we must calculate the standard deviation of the market portfolio using the Capital Market Line (CML): The risk-free rate asset has a return of 5% and a standard deviation of zero and the portfolio has an expected return of 25% and a standard deviation of 4%. These two points must lie on the Capital Market Line. The slope of the Capital Market Line is: Slope of CML = Increase in Expected Return / Increase in Standard Deviation = (0.25? 0.05) / (0.04 - 0) = 5 According to the Capital Market Line we have that: E(ri) = rf + SlopeCML * STDi where E(ri) = the expected return on security i rf = risk-free rate SlopeCML = slope of the Capital Market Line STDi = the standard deviation of security i Since we know the expected return on the market portfolio is 20%, the risk-free rate is 5%, and the slope of the Capital Market Line is 5, we can solve for the standard deviation of the market portfolio (STDm). E(rm) = rf + SlopeCML * STDm ==> ==> 0.20 = 0.05 + 5 * STDm ==> ==> STDm = (0.20 ? 0.05) / 5 = 0.03 or 3% Now we can use the found STDm to find the beta of a security that has a correlation with the market portfolio of 0.5 and a standard deviation of 2%. Beta of security = [Correlation * STD of Security)] / STDm = (0.5 * 0.02) / 0.03 = 0.3333 According to the CAPM we have that: E(r) = rf + Beta_s * [E(rm) - rf] where E(r) = expected return on the security rf = risk-free rate Beta_s = beta of the security E(rm) = expected return on the market portfolio In this problem we have that: rf = 0.05 Beta_s = 0.3333 E(rm) = 0.20 E(r) = rf + Beta_s * [E(rm) - rf] = = 0.05 + 0.3333 * (0.20 - 0.05) = = 0.10 or 10% The expected rate of return of a security that have a 0.5 correlation with the market portfolio and standard deviation of 2% is 10% . ------------------------------------------------------ 2. Johnson paint stock has an expected return of 19% and a beta of 1.7, while Tire stock has an expected return of 14% and a beta of 1.2. Assume the capital asset preicing model holds. What is the expected return on the market? What is the risk free rate? Since the CAPM holds, both securities must lie on the Security Market Line (SML); then if we call: SlopeSML = slope of the Security Market Line E(rJ) = expected return on Johnson Paint?s stock E(rT) = expected return on Tire?s Stock Beta_J = beta of Johnson?s stock Beta_T = beta of Tire?s stock we have that: SlopeSML = [E(rJ) ? E(rT)] / (Beta_J - Beta_T) = = (0.19 ? 0.14) / (1.7 ? 1.2) = = 0.10 A security with a beta of 1.7 has an expected return of 0.19. Moving along the SML from a beta of 1.7 to a beta of 1.0, beta decreases by 0.7 (= 1.7 ? 1.0). Since SlopeSML = 0.10, as beta decreases by 0.7, expected return decreases by 0.07 (= 0.7 * 0.10). Then, the expected return on a security with a beta of 1.0 equals 12% (= 0.19 - 0.07). Since the market portfolio has a beta of one, the expected return on the market portfolio is 12%. According to the CAPM we have that: E(r) = rf + Beta_s * [E(rm) - rf] where E(r) = expected return on the security rf = risk-free rate Beta_s = beta of the security E(rm) = expected return on the market portfolio In this problem we have that: E(r) = 0.19 rf = unknown Beta_s = 1.7 E(rm) = 0.12 0.19 = rf + 1.7 * [0.12 - rf] ==> (solving for rf) ==> rf = [0.19 - (1.7 * 0.12)] / (-0.7) = = 0.02 or 2% The risk-free rate is 2%. ------------------------------------------------------ 3. Suppose you have invested $30,000 in the following four stocks: Security Amount Invested Beta Stock A $5,000 0.75 Stock B $10,000 1.1 Stock C $8,000 1.36 Stock D $7,000 1.88 The risk free rate is 4% and the expected return on the market portfolio is 15%. Based on the capital asset pricing model, what is the expected return on the above portfolio? To start we need to find the beta of the portfolio (Beta_p) Total Invest = $5,000 + $10,000 + $8,000 + $7,000 = $30,000 Weight of Stock A = $5,000 / $30,000 = 1/6 Weight of Stock B = $10,000 / $30,000 = 1/3 Weight of Stock C = $8,000 / $30,000 = 4/15 Weight of Stock D = $7,000 / $30,000 = 7/30 Recall that the beta of a portfolio is the weighted average of the betas of its individual components: Beta_p = (1/6)*(0.75) + (1/3)*(1.1) + (4/15)*(1.36) + (7/30)*(1.88) = = 1.293 According to the CAPM we have that: E(r) = rf + Beta_p * [E(rm) - rf] where E(rp) = expected return on the portfolio rf = risk-free rate Beta_p = beta of the portfolio E(rm) = expected return on the market portfolio In this problem we have that: rf = 0.04 Beta_p = 1.293 E(rm) = 0.15 E(r) = rf + Beta_s * [E(rm) - rf] = = 0.04 + 1.293 * [0.15 - 0.04] = = 0.1822 or 18.22% The expected return on the portfolio is 18.22%. ------------------------------------------------------- COMMENT ON THE FOLLOWING: 4. Suppose the expected return and standard deviations of stocks A and B are E(R A) = 0.15, and E(R B) = 0.25, ? A = 0.1 and ? B = 0.2 respectively. a. calculate the expected return and standard deviation of a portfolio that is composed of 40% A and 60% B when the correlation between the returns on A and B is 0.5. b. calculate the standard deviation of a portfolio that is composed of 40% A and 60% B when the correlation coefficient between the returns on A and B is -0.5. c. how does the correlation between the returns on A and B affect the standard deviation o the portfolio? a. what financial concept or principle is the problem asking you to solve? We need to use the concepts of weighted average summation/Expected Return, and the relationship between Correlation, Variance of the return, and Standard Deviation of the return. b. in the context of the problem scenario, what are some business decisions that a manager would be able to make after solving the problem? For example he will try to make a portfolio with a proper correlation between stocks that make the expected return more predictible, by lowering the STD. Also try to find the correct weights of the different stocks to build a less risky portfolio. c. is there any additional information missing from the problem that would enhance the decision making process? If possible, historical data could help to stimate correlations between different stocks, this would help to build a better portfolio. d. without showing mathematical calculations, explain in writing how you would solve the problem. First we need to use the weighted average summation to get the expected return on the portfolio: E(rp) = (WA)*[E(rA)] + (WB)*[E(rB)] Then we need to use the Variance formula to get the variance of the portfolio: Variance = (WA)^2*(STDA)^2 + (WB)^2*(STDB)2 + 2*(WA)*(WB)*(STDA)*(STDB)*[Correlation(rA, rB)] Finally to get the STD of the portfolio (STDp) we use: STDp = sqrt(Variance of the portfolio) -------------------------------------------------------- I hope that this helps you. Feel free to request for a clarification if you need it. Regards. livioflores-ga | |
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Subject:
Re: FINANCE
From: notamathwhiz-ga on 01 Jul 2005 10:01 PDT |
Hi!! 1. A portfolio that combines the risk free asset and the market portfolio has an expected return of 25% and a standard deviation of 4%. The risk free rate is 5%, and the expected return on the market portfolio is 20%. Assume the capital asset pricing model holds. What expected rate of return would a security earn if it had a 0.5 correlation with the market portfolio and standard deviation of 2%? First, we must calculate the standard deviation of the market portfolio using the Capital Market Line (CML): The risk-free rate asset has a return of 5% and a standard deviation of zero and the portfolio has an expected return of 25% and a standard deviation of 4%. These two points must lie on the Capital Market Line. The slope of the Capital Market Line is: Slope of CML = Increase in Expected Return / Increase in Standard Deviation = (0.25? 0.05) / (0.04 - 0) = 5 According to the Capital Market Line we have that: E(ri) = rf + SlopeCML * STDi where E(ri) = the expected return on security i rf = risk-free rate SlopeCML = slope of the Capital Market Line STDi = the standard deviation of security i Since we know the expected return on the market portfolio is 20%, the risk-free rate is 5%, and the slope of the Capital Market Line is 5, we can solve for the standard deviation of the market portfolio (STDm). E(rm) = rf + SlopeCML * STDm ==> ==> 0.20 = 0.05 + 5 * STDm ==> ==> STDm = (0.20 ? 0.05) / 5 = 0.03 or 3% Now we can use the found STDm to find the beta of a security that has a correlation with the market portfolio of 0.5 and a standard deviation of 2%. Beta of security = [Correlation * STD of Security)] / STDm = (0.5 * 0.02) / 0.03 = 0.3333 According to the CAPM we have that: E(r) = rf + Beta_s * [E(rm) - rf] where E(r) = expected return on the security rf = risk-free rate Beta_s = beta of the security E(rm) = expected return on the market portfolio In this problem we have that: rf = 0.05 Beta_s = 0.3333 E(rm) = 0.20 E(r) = rf + Beta_s * [E(rm) - rf] = = 0.05 + 0.3333 * (0.20 - 0.05) = = 0.10 or 10% The expected rate of return of a security that have a 0.5 correlation with the market portfolio and standard deviation of 2% is 10% . ------------------------------------------------------ 2. Johnson paint stock has an expected return of 19% and a beta of 1.7, while Tire stock has an expected return of 14% and a beta of 1.2. Assume the capital asset preicing model holds. What is the expected return on the market? What is the risk free rate? Since the CAPM holds, both securities must lie on the Security Market Line (SML); then if we call: SlopeSML = slope of the Security Market Line E(rJ) = expected return on Johnson Paint?s stock E(rT) = expected return on Tire?s Stock Beta_J = beta of Johnson?s stock Beta_T = beta of Tire?s stock we have that: SlopeSML = [E(rJ) ? E(rT)] / (Beta_J - Beta_T) = = (0.19 ? 0.14) / (1.7 ? 1.2) = = 0.10 A security with a beta of 1.7 has an expected return of 0.19. Moving along the SML from a beta of 1.7 to a beta of 1.0, beta decreases by 0.7 (= 1.7 ? 1.0). Since SlopeSML = 0.10, as beta decreases by 0.7, expected return decreases by 0.07 (= 0.7 * 0.10). Then, the expected return on a security with a beta of 1.0 equals 12% (= 0.19 - 0.07). Since the market portfolio has a beta of one, the expected return on the market portfolio is 12%. According to the CAPM we have that: E(r) = rf + Beta_s * [E(rm) - rf] where E(r) = expected return on the security rf = risk-free rate Beta_s = beta of the security E(rm) = expected return on the market portfolio In this problem we have that: E(r) = 0.19 rf = unknown Beta_s = 1.7 E(rm) = 0.12 0.19 = rf + 1.7 * [0.12 - rf] ==> (solving for rf) ==> rf = [0.19 - (1.7 * 0.12)] / (-0.7) = = 0.02 or 2% The risk-free rate is 2%. ------------------------------------------------------ 3. Suppose you have invested $30,000 in the following four stocks: Security Amount Invested Beta Stock A $5,000 0.75 Stock B $10,000 1.1 Stock C $8,000 1.36 Stock D $7,000 1.88 The risk free rate is 4% and the expected return on the market portfolio is 15%. Based on the capital asset pricing model, what is the expected return on the above portfolio? To start we need to find the beta of the portfolio (Beta_p) Total Invest = $5,000 + $10,000 + $8,000 + $7,000 = $30,000 Weight of Stock A = $5,000 / $30,000 = 1/6 Weight of Stock B = $10,000 / $30,000 = 1/3 Weight of Stock C = $8,000 / $30,000 = 4/15 Weight of Stock D = $7,000 / $30,000 = 7/30 Recall that the beta of a portfolio is the weighted average of the betas of its individual components: Beta_p = (1/6)*(0.75) + (1/3)*(1.1) + (4/15)*(1.36) + (7/30)*(1.88) = = 1.293 According to the CAPM we have that: E(r) = rf + Beta_p * [E(rm) - rf] where E(rp) = expected return on the portfolio rf = risk-free rate Beta_p = beta of the portfolio E(rm) = expected return on the market portfolio In this problem we have that: rf = 0.04 Beta_p = 1.293 E(rm) = 0.15 E(r) = rf + Beta_s * [E(rm) - rf] = = 0.04 + 1.293 * [0.15 - 0.04] = = 0.1822 or 18.22% I've done this equation several times and come up with .0147 or 1.47% |
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