Broad Bond Exposure or Tax-Exempt Muni Income? BND vs. MUB

Vanguard Total Bond Market ETF (NASDAQ:BND) offers broad exposure to taxable investment-grade bonds at a lower cost, while iShares National Muni Bond ETF (NYSEMKT:MUB) focuses on tax-exempt income with historically lower volatility.

Fixed-income investors often choose between taxable and tax-exempt strategies to manage risk and income. This comparison evaluates how BND, a massive aggregate bond fund, matches up against MUB, a leading municipal bond fund, regarding costs, returns, and portfolio composition.

Snapshot (cost & size)

Beta measures price volatility relative to the S&P 500; beta is calculated from five-year monthly returns. The 1-yr return represents total return over the trailing 12 months. Dividend yield is the trailing-12-month distribution yield.

The Vanguard fund is the more affordable option with its 0.03% expense ratio. While its 4.00% dividend yield is higher than the 3.20% offered by the iShares fund, investors may want to consider the tax-exempt status of municipal bond payouts.

Performance & risk comparison

What’s inside

Vanguard Total Bond Market ETF (NASDAQ:BND) provides extensive exposure to the U.S. domestic, taxable, investment-grade fixed-income market. Its portfolio is highly diversified across 346 holdings, where no single position exceeds 0.48% of the total assets under management (AUM). It serves as a broad tool for portfolio diversification, primarily holding government and corporate bonds while excluding inflation-protected or tax-exempt securities.

iShares National Muni Bond ETF (NYSEMKT:MUB) is designed to replicate the performance of high-quality municipal bonds issued across the United States. Also launched in 2007, the iShares fund has a trailing-12-month dividend of $3.40 per share. Unlike BND, it focuses on tax-exempt income, which often appeals to investors in higher tax brackets.

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What this means for investors

For bond investors, a higher stated yield does not always translate into more after-tax income. This is a key consideration when comparing the Vanguard Total Bond Market ETF, which provides broad taxable bond exposure, with the iShares National Muni Bond ETF, which offers federally tax-exempt municipal income.

BND is a core taxable bond fund with exposure to Treasuries, agency mortgage-backed securities, and investment-grade corporate bonds, offering broad access to the taxable investment-grade bond market in a single low-cost ETF. In contrast, MUB holds investment-grade municipal bonds, appealing primarily through federally tax-exempt income rather than a high stated yield. For investors in higher tax brackets, MUB’s tax treatment can make its lower yield more attractive on an after-tax basis.

The appropriate choice between the two ETFs depends on the account type and the intended role of the bond allocation. BND is often better suited for tax-advantaged accounts or portfolios seeking broad taxable bond exposure. MUB is typically more relevant in taxable accounts for investors who prioritize federally tax-exempt income and are comfortable with municipal credit and duration risk. Both funds carry interest-rate risk, and the main difference falls between broad taxable bond exposure and tax-exempt municipal income.

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Eric Trie has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Vanguard Total Bond Market ETF. The Motley Fool has a disclosure policy.

Broad Bond Exposure or Tax-Exempt Muni Income? BND vs. MUB was originally published by The Motley Fool