1-Calculate the expected value of NPV if the risk-free rate equal to 8%.
2-If cash flows are considered independent. Calculate the variance and standard deviation of the NPV.
3-What is the probability that the NPV of the project is less than or equal to zero?
4-If cash flows are considered totally dependent. Calculate the variance and standard deviation of the NPV.
5-What is the probability that the profitability index is greater than 2?
finance : investment decision under uncertainty
*Project selection for several periods - a state of complete independence*
Solution:
1) Expected Value of NPV
NPV=(Cash flow/(1+i)t )−initial investment
where:i=Required return or discount rate
t=Number of time periods
Expected Cash Flow = Cash Flow * Probability
Period 1 | ||
3000 | .10 | 300 |
5000 | .20 | 1000 |
6000 | .25 | 1500 |
8000 | .15 | 1200 |
7000 | .30 | 2100 |
Total |
6100 SAR |
Period 2 | ||
4000 | .15 | 600 |
5000 | .20 | 1000 |
7000 | .25 | 1750 |
4000 | .20 | 800 |
6000 | .20 | 1200 |
Total | 5350 SAR |
NPV = (Expected Cash Flow Period 1 * Dicount Rate at 8%) + (Expected Cash Flow Period 2 * Dicount Rate at 8%) - Initial Investment
= (6100 * .92593) + (5350 *.85734) - 10,000
= 5648.173 + 4586.769 - 10000
= 234.942 SAR
Thus, the Expected Value of NPV at 8% risk free rate is 234.942 SAR
2) Variance and Standard Deviation of NPV
Period 1:
Variance = (Cash Flow - Total Expected Cash)2 * Probability
(3000 - 6100)2 *.10 | 961000 |
( 5000 - 6100)2 *.20 | 242000 |
( 6000- 6100)2 *.25 | 2500 |
( 8000- 6100)2 *.15 | 541500 |
( 7000- 6100)2 *.30 | 243000 |
Total | 1990000 |
Standard Deviation of Period 1 = √1990000
= 1410.674
Period 2:
(4000 - 5350) * .15 | 273375 |
(5000 - 5350) * .20 | 24500 |
(7000 - 5350) * .25 |
680625 |
(4000 - 5350) * .20 | 364500 |
(6000 - 5350) * .20 | 84500 |
Total | 1427500 |
Standard Deviation of Period 2 = √1427500
= 1194.780
Standard Deviation of NPV = √({[1410.674]2 / [1+0.08]2} + {[1194.780]2 / [1+0.08]2})
= √({1706105.22485} + {1223850.5216})
= 1711.7114 SAR
Variance of NPV = Square of Standard deviation
= 1711.7114 * 1711.7114
= 2929955.74645 SAR
Thus, the standard deviation of NPV is 1711.7114 SAR and the variance of NPV is 2929955.74645 SAR
3) Probability that the NPV of the project is less than or equal to zero
Z = (0- {234.942/1711.7114}).
= -0.1373
According to the Z table, the probability of NPV being zero is .44828 that is 44.828%. THus, the probability of NPV being zero is .8 - .44828 = 0.35172 or 35.172%.
4) Standard Deviation and Variance when totally dependent
Standard Deviation of NPV = ({√1990000} / 1.08) + {√1427500} / {1.08}2)
= 1306.17925737 + 1024.33154537
= 2330.51080274 SAR
Variance of NPV = Square of standard deviation
= 2330.51080274 * 2330.51080274
= 5431280.60618 SAR
Thus, the standard deviation of NPV when cash flows are dependent is 2330.51080274 and variance of NPV when dependent is 5431280.60618 SAR
5) Probability that the profitability index is greater than 2
Probability Index grater than 2 = p(Z grater than or equal to (10000-234.492)/2330.51080274
= P(Z ≥ 4.19)
= P(Z ≤ -4.19)
= 0.00001
= .001%
Thus, Probability that the profitability index is greater than 2 is 0.001%
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