In: Finance
RTF stock is expected to return 11 percent in a normal economy and lose 15 percent in recession. The probability of a recession is 33 percent while the probability of a booming economy is zero percent. What is the variance of the returns on RTF stock?
Step-1:Calculation of expected return of RTF stock | ||||
State of economy | Probability | Return with probability | Expected return with probability | |
a | b | c=a*b | ||
Normal | 0.6700 | 0.1100 | 0.0737 | |
Recession | 0.3300 | -0.1500 | -0.0495 | |
Total | 1.0000 | 0.0242 | ||
So, expected return is | 0.0242 | |||
Step-2:Calculation of variance of return | ||||
State of economy | Probability | Return with probability | Expected return | |
a | b | c | d=((b-c)^2)*a | |
Normal | 0.6700 | 0.1100 | 0.0242 | 0.004932 |
Recession | 0.3300 | -0.1500 | 0.0242 | 0.010014 |
Total | 1.0000 | 0.0484 | 0.002343 | |
Thus, | ||||
Variance of return is | 0.002343 |