In: Finance
You are trying to allocate your assets into a risky portfolio and the purchase of a risk free asset with a return of 2%. You use the following data to estimate information about the risky portfolio:
| 
 Year  | 
 Return  | 
| 
 2014  | 
 -15%  | 
| 
 2015  | 
 -5%  | 
| 
 2016  | 
 30%  | 
| 
 2017  | 
 -10%  | 
| 
 2018  | 
 35%  | 
If you have a risk-aversion factor of 2.5, what percentage of your total portfolio should be in the risky portfolio?
Year   Return   Dev.
=Return-E(r)   Squared Dev.
2014   -15.00%   -22.00%  
4.8400%
2015   -5.00%   -12.00%  
1.4400%
2016   30.00%   23.00%  
5.2900%
2017   -10.00%   -17.00%  
2.8900%
2018   35.00%   28.00%   7.8400%
Total    35.00% 22.3000%
Expected Return= Total/number of years  
       
35%/5          
=7.00%          
Standard deviation =√( sum of squared deviation/(n-1))  
       
√(22.3%/(5-1))      
   
=23.61%          
Risk free rate=   2%      
Risk aversion factor=   2.5  
   
Formula for investment in risky portfolio  
       
Weight of ORP = ( Expected retun of Risky portfolio - Risk free
rate)/(risk aversion coefficiennt * Std. dev. of ORP
^2)          
(Er (P) - Rf)/ (A*Sd^2)      
   
          
=(7%-2%)/(2.5*(23.61%)^2)      
   
=0.3587880928   or 35.88%  
   
          
So portfolio invested in Risky portfolio=  
35.88%