In: Finance
What is the relationship between the value of an annuity and discount rates? suppose you bought a 20 year annuity of 4700 per year at the current discount rate of 10 percent per year. what happens to the value of your investment if the discount rate suddenly drops to 5 percent? what if the discount rate suddenly rises to 15 percent?
Value of investment at 10% | P×[1-(1÷(1+r)^n)]÷r | |
Here, | ||
A | Interest rate per annum | 10.00% |
B | Number of years | 20 |
C | Number of compoundings per per annum | 1 |
A÷C | Interest rate per period ( r) | 10.00% |
B×C | Number of periods (n) | 20 |
Payment per period (P) | $ 4,700 | |
Value of investment at 10% | $ 40,013.75 | |
4700×(1-(1÷(1+10%)^20))÷10% |
Value of investment at 5% | P×[1-(1÷(1+r)^n)]÷r | |
Here, | ||
A | Interest rate per annum | 5.00% |
B | Number of years | 20 |
C | Number of compoundings per per annum | 1 |
A÷C | Interest rate per period ( r) | 5.00% |
B×C | Number of periods (n) | 20 |
Payment per period (P) | $ 4,700 | |
Value of investment at 5% | $ 58,572.39 | |
4700×(1-(1÷(1+5%)^20))÷5% |
Value of investment at 15% | P×[1-(1÷(1+r)^n)]÷r | |
Here, | ||
A | Interest rate per annum | 15.00% |
B | Number of years | 20 |
C | Number of compoundings per per annum | 1 |
A÷C | Interest rate per period ( r) | 15.00% |
B×C | Number of periods (n) | 20 |
Payment per period (P) | $ 4,700 | |
Value of investment at 15% | $ 29,418.86 | |
4700×(1-(1÷(1+15%)^20))÷15% |