Final answer:
To calculate the after-tax yield of a Treasury bond, you multiply the bond's yield by (1 minus the tax rate). For a 30-year Treasury bond with a 6 percent yield and a 25 percent tax rate, the after-tax yield is 4.5 percent.
Step-by-step explanation:
You have asked how to calculate the after-tax yield of a 30-year Treasury bond with a yield of 6 percent if the bank's tax rate is 25 percent. To find the after-tax yield, we multiply the bond's yield by (1 minus the tax rate). Here is the calculation:
After-tax yield = Treasury bond yield × (1 - tax rate)
After-tax yield = 6% × (1 - 0.25)
After-tax yield = 6% × 0.75
After-tax yield = 4.5%
So, the after-tax yield on the 30-year Treasury bond for the bank, given a tax rate of 25 percent, would be 4.5 percent when rounded to one decimal place.