Question

In: Finance

Consider the following annual returns on 2 stocks: (10 pts) Year HCA WLMT 2017 35% 3%...

  1. Consider the following annual returns on 2 stocks: (10 pts)

Year

HCA

WLMT

2017

35%

3%

2016

20%

5%

2015

3%

9%

2014

-12%

15%

  1. Calculate the expected return on each stock. (2 pts)
  2. Calculate the standard deviation on each stock. (3 pts)
  3. Assume you create a portfolio with equal weight in each stock. Calculate the expected return of the portfolio. (2 pts)
  4. Calculate the standard deviation of the equally weighted portfolio. (3 pts)

Solutions

Expert Solution

(Return in %)
Year HCL(x) WLMT(y) (x-(∑x/n))^2 (y-(∑y/n))^2 (x-(∑x/n))(y-(∑y/n))
2014 -12 15 552.25 49.00 -164.5
2015 3 9 72.25 1.00 -8.5
2016 20 5 72.25 9.00 -25.5
2017 35 3 552.25 25.00 -117.5
Total 46 32 1249.00 84.00 828

Ans a.

HCL(x) WLMT(y)
Expected Return = ∑x/n Total return/total years 11.50 8.00

Ans b

Standard deviation= Formula ((∑(x-(∑x/n))^2)/n)^(1/2) ((∑(y-(∑y/n))^2)/n)^(1/2)
S.D                                                         17.67                                                                    4.58
Working (1249/4)^(1/2) (84/4)^(1/2)

Ans c

Expected Return of Portfolio= (Return of stock A* weight of stock A) + (Return of stock B* weight of stock B)
(11.5*0.5)+(8*0.5)
9.75

Ans d

covariance (x,y)= (∑(x-(∑x/n))(y-(∑y/n)))/n
207 (828/4)
Standard Deviation of Portfolio= [{(weight of A)^2 * (sigma of A)^2} + {(weight of B)^2 + (sigma of B)^2} + {2*(weight of A)*(weight of B)*Covariance of A&B }^(1/2)
= (((0.5^2)*(17.67^2))+((0.5^2)*(4.58^2))+(2*0.5*0.5*207))^(1/2)
=       13.67

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