In: Finance
The expected return of the market index over 2022 is 10%. The standard deviation of returnsof the market index is expected to remain at its long-term average of 18%. The risk-free rate is4%. Calculate:
a. The degree of risk aversion (commonly denoted by ‘A’) for an investor in the marketindex.
b. The Sharpe ratio of the market index portfolio.
(a)
Risk free rate (Rf) = 4% or 0.04
Market return (Em) = 10% or 0.1
Market risk (M sd) = 18% or 0.18
Market variance (M v) = 0.18*0.18
= 0.0324
Market return = Market variance * degree of risk aversion + risk free rate
0.1 = 0.0324 * degree of risk aversion + 0.04
Risk aversion = 1.8518
(b)
Share ratio = (Market Return - Risk free rate)/ Market risk
= (0.1 - 0.04) / 0.18
= 0.33
a. Risk aversion is 1.8518
b. Share ratio is 0.33.