You have $102,000 to invest in a portfolio containing Stock X, Stock Y, and a ri
ID: 2716721 • Letter: Y
Question
You have $102,000 to invest in a portfolio containing Stock X, Stock Y, and a risk-free asset. You must invest all of your money. Your goal is to create a portfolio that has an expected return of 11 percent and that has only 80 percent of the risk of the overall market. If X has an expected return of 25 percent and a beta of 2.1, Y has an expected return of 16 percent and a beta of 1.4, and the risk-free rate is 5 percent, how much money will you invest in Stock Y? (Do not round intermediate calculations. Round your answer to the nearest whole dollar.)
You have $102,000 to invest in a portfolio containing Stock X, Stock Y, and a risk-free asset. You must invest all of your money. Your goal is to create a portfolio that has an expected return of 11 percent and that has only 80 percent of the risk of the overall market. If X has an expected return of 25 percent and a beta of 2.1, Y has an expected return of 16 percent and a beta of 1.4, and the risk-free rate is 5 percent, how much money will you invest in Stock Y? (Do not round intermediate calculations. Round your answer to the nearest whole dollar.)
Explanation / Answer
let wX,wY and wR be proportion of portfolio invested in Stock X, Stock Y, and a risk-free asset respectively.
expected return of portfolio =wX*expected return X+wY*expected return Y+wR*expected return R
put values,expected return X=25%,expected return Y=16%,expected return R=5%
11% =wX*25%+wY*16%+wR*5%
=>25wX+16wY+5wR=11 ...1)
also proportions should sum to 1=>wX+wY+wR=1 ...2)
beta of portfolio=.80= wX*beta X+wY*beta Y+wR*beta R
put values,beta X=2.1,beta Y=1.4 and beta R=0
=>.80= wX*2.1+wY*1.4+wR*0
=>21wX+14wY=8....3)
solve equations 1,2,3
=>eliminate wR from 1) and 2) =>25wX+16wY+5(1-wX-wY)=11
=>20wX+11wY=11-5=6 ...4)
from 3 and 4 equations,
3-4=>wX+3wY=2 =>wX=2-3wY put this in 4
=>20(2-3wY)+11wY=6
=>34=49wY =>wY=34/49 , wX=2-3(34/49)=(98-102)/49=-4/49
and wR=1-(34/49-4/49)=1-30/49=19/49
Thus u should invest 34/49 proportion of portfolio of sum $102,000 in Y=$(34/49)*102,000=$ 70775.51.
Thus u should invest $ 70776 in Y.
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