求翻译：市政债券。因为市政债券在税前虽然是收益率最低的，但是在高所得税税率下却是收益最高的。例如本题中，企业债券在减去所得税之后收益率等于是什么意思？

Municipal bonds. Because municipal bonds, although in pre-tax yield the lowest, but lower in the high income tax rate is the highest yielding. For example, in this question, corporate bonds, after the income tax rate of return equal to minus

municipal bonds. Because municipal bonds in pre-tax while the yield minimum, but in high-income tax rate is the highest yielding. For example, corporate bonds, as in 19675 minus after tax yield is equal to

Municipal bond.Because municipal bond in front of tax although is the returns ratio lowest, but under the high income tax tax rate is actually the income highest.For example in the main subject, the enterprise bond after subtracts the income tax the returns ratio was equal to

City bonds. Because municipal bond has the lowest rate of return before tax, but in the higher income tax rate was the highest income. For example in the afternoon, yields on corporate bonds after subtracting income taxes equal to

Municipal bonds. Because municipal bond has the lowest rate of return before tax, but in the higher income tax rate was the highest income. For example in the afternoon, yields on corporate bonds after subtracting income taxes equal to