Final answer:
The after-tax rate of return on the City of Austin Municipal Bond is 3.75%, while the after-tax rate of return on the BBB Corporation bond is 6%.
Step-by-step explanation:
The after-tax rate of return for the City of Austin Municipal Bond can be calculated as follows:
- First, calculate the pre-tax interest earned on the bond by multiplying the initial investment amount ($10,000) by the interest rate (5%). This gives $500 in interest earned.
- Next, calculate the amount of tax paid on the interest by multiplying the pre-tax interest by the marginal tax rate (25%). This gives $125 in tax paid.
- Finally, subtract the tax paid from the pre-tax interest earned to find the after-tax interest earned. In this case, it is $500 - $125 = $375.
Therefore, the after-tax rate of return on the City of Austin Municipal Bond is $375 / $10,000 = 3.75%.
The after-tax rate of return for the BBB Corporation bond can be calculated in a similar manner, with a pre-tax interest of $800 and tax paid of $200. So, the after-tax interest earned is $800 - $200 = $600. Therefore, the after-tax rate of return on the BBB Corporation bond is $600 / $10,000 = 6%.