
Paper P4: Advanced Financial Management
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(d) Calculate the correlation coefficient for returns from Security X and Security Y,
for a portfolio consisting of 50% of the funds invested in Security X and 50% of
the funds invested in Security Y. The formula for correlation coefficient is:
ρ
x,y
= Cov
x,y
σ
x
x σ
y
where:
x
σ = the standard deviation of returns from Security X
y
σ = the standard deviation of returns from Security Y
Comment on the correlation coefficient.
(e) Calculate expected return, the variance and standard deviation of a portfolio
consisting of 50% of the funds invested in Security X and 50% of the funds
invested in Security Y. The formula for correlation coefficient is:
a
2
(Variance X)
2
+ (1 – a)
2
(Variance Y)
2
+ 2a(1 – a) Cov
x,y
where:
a = the proportion of the portfolio invested in Security X
(1 – a) = the proportion of the portfolio invested in Security Y
Variance X = the variance of the returns from Security X
Variance Y = the variance of the returns from Security Y
(f) Calculate expected return, the variance and standard deviation of a portfolio
consisting of 80% of the funds invested in Security X and 20% of the funds
invested in Security Y.
9 Risk and return
A divisional manager’s attitude to investing in new projects is affected by his
attitude to risk. He is prepared to invest in a project that is more risky, provided that
it offers a higher expected return.
He is currently considering four mutually exclusive projects, for which the
estimated returns and risk are as follows:
Project Estimated project NPV Risk (σ)
Project 1 80% chance of + $4 million, 20% chance of + $2 million 0.80
Project 2 70% chance of + $5 million, 30% chance of + $1.5 million
1.60
Project 3 60% chance of + $6 million, 40% chance of + $1 million
Not yet calculated
Project 4 50% chance of + $8 million, 50% chance of
$1 million
Not yet calculated
Required
(a) Calculate the risk with Project 3 and Project 4.
(b) Suggest which of the four projects the divisional manager will select.
10 Coefficient of variation
A multinational company is planning to invest in two developing countries, and it
will invest equal amounts of capital in each country. It is looking at returns and risk
in each of three possible countries that might be selected for investment.