Answer:
Option (B) is correct.
Explanation:
Given that,
Marginal federal income tax rate = 30%
Sum of your marginal state and local tax rates = 5%
Yield on thirty-year U.S. Treasury bonds = 10%
Municipal bond has a yield:
= U.S Treasury bonds × (1 - tax)
= 10% × (1 - 30%)
= (10 ÷ 100) × [1 - (30 ÷ 100)]
= (10 ÷ 100) × (70 ÷ 100 )
= (1 ÷ 10) × (7 ÷ 10 )
= (7 ÷ 100)
= 7%