For a taxpayer in the marginal tax rate of 20% which of the following bonds is a better alternative (just in terms of return)

10% Pfizer corporate bond

8% municipal bond

9.5% EXXON corporate bond

Select one:

10% corporate bond

8% municipal bond

The Pfizer bond and the municipal bond are the best options and provides the same return after and before taxes

all 3 bonds provides the same return after and before taxes

9% corporate bond