In: Finance
Suppose the government decides to issue a new savings bond that is guaranteed to double in value if you hold it for 16 years. Assume you purchase a bond that costs $75. a. What is the exact rate of return you would earn if you held the bond for 16 years until it doubled in value? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. If you purchased the bond for $75 in 2017 at the then current interest rate of .21 percent year, how much would the bond be worth in 2025? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. In 2025, instead of cashing in the bond for its then current value, you decide to hold the bond until it doubles in face value in 2033. What annual rate of return will you earn over the last 8 years? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)
First Question's Solution:
Bond Current Price | $ 75 | |
Number of years | 16 | |
Interest Rate | 4.5% | 72/ numbers of years (Formula) |
Note: Doubling rule says that to find the number of years required to double your money at a given interest rate, you just divide the interest rate into 72.
Second question's solution:
Particulars | Data | Formulas |
Bond Current Price | $ 75 | |
Interest Rate | 0.21 | |
Number of years | 8 | |
FV of bond in 2025 | 344.622974 | FV formula in excel |
As there is not given any coupon rate in second question.
Third question:
Particulars | Data | Formulas |
Bond Current Price | $ (344.62) | Calculated in Q2 |
FV of bond in 2015 | 689.244 | Double of 2025 |
Number of years | 8 | |
Return Rate | 9.05% | Rate formula in excel |
Doubling rule of 72 also derives 9% answer i.e.72/8 = 9%