Municipal Bond ETF MUB May Offer Retirees Better After-Tax Income Than AGG

AGG provides broad investment-grade bond exposure, but much of its income is federally taxable in a taxable brokerage account. MUB charges 0.05%, has a recent 30-day SEC yield of 3.84%, and generally pays municipal interest that is exempt from federal income tax. Its estimated 6.49% tax-equivalent yield may give higher-bracket retirees more spendable income than a lower headline yield suggests.
AGG tracks broad U.S. investment-grade bond market, holding Treasuries, agency mortgage-backed securities, and corporate debt. In taxable accounts, much of that income is federally taxable, which can reduce spendable cash for retirees.
MUB costs 0.05%, recently yielded 3.84% on a 30-day SEC basis, and its qualifying municipal interest is generally free from federal income tax. Its estimated 6.49% tax-equivalent yield illustrates how higher-bracket retirees may keep more after-tax income. National muni funds hold bonds from states, cities, counties, and related issuers; revenue bonds rely on project cash flows, while private activity bonds may raise AMT concerns.
Retirees with taxable brokerage accounts and higher federal tax brackets may be most affected. If they shift bond allocation from AGG to MUB, they could retain more after-tax income, potentially improving retirement cash flow. Municipal issuers might benefit from added demand, though credit risk and AMT exposure remain considerations. Financial advisers may need to compare tax-equivalent yields rather than headline yields.