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Muni Bond Basics for Investors: Know the Benefits & Risks

Are you—or would you like to become—a municipal bond investor? Understand the potential benefits and risks, and learn about a new service from TD Ameritrade that alerts clients on new muni issuances.

https://tickertapecdn.tdameritrade.com/assets/images/pages/md/Building bridges: benefits of muni bonds
5 min read
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Key Takeaways

  • Municipal bonds are interest-bearing debt obligations sold by a government entity to finance capital projects
  • Interest earned on muni bonds is typically exempt from federal taxes and, in some cases, exempt from state and local taxes

  • Muni bond rates vary depending on the creditworthiness of the issuer; as with other bonds, there is a risk of default

Municipal bonds, aka munis, may not come to investors’ minds every day. But muni bonds are at work all around us, providing funds to build roads, bridges, parks, schools, and other things vital to our everyday lives that may yet be taken for granted. Two-thirds of infrastructure projects in the United States are funded by muni bonds, according to the Municipal Securities Rulemaking Board.

Tax-free muni bonds may be appealing for many investors, and muni bonds in general can be a valuable tool for a long-term portfolio strategy, according to Roza Shamailov, senior manager, fixed income trading and syndicate at TD Ameritrade. Investors should also be aware of a few caveats and potential downsides of muni bonds. Let’s look at a few muni bond pointers for investors.

What Is a Muni Bond?

Muni bonds are interest-bearing debt obligations sold by a state, county, city, or other government agency or authority to finance public capital projects. In addition to schools, roads, and bridges, these projects may include hospitals, jails, stadiums, and low-income housing.

Similar to Treasuries and other types of bonds, munis are considered debt securities. They’re tradable financial instruments with predefined principal amounts, interest, and maturities. Munis are also considered fixed-income securities, meaning investors receive periodic interest payments (typically every six months) of a nonvariable amount until the bond matures. There are two main types of municipal bonds: general obligation bonds and revenue bonds. A general obligation bond is paid back through the unlimited taxing power of a state or local government. A revenue bond is paid back through the project’s ability to raise revenue and pay off debt, which typically makes this type of muni higher risk than a general obligation bond.

There’s also a third type of muni called a private activity bond. It’s sold on behalf of a municipality but for the benefit of a private entity such as a sports team. Each bond offering comes with its own set of riders, clauses, and potentially unique risks, which are all spelled out in the prospectus.

How Big Is the Muni Bond Market?

In dollar terms, the muni bond market is a relative pipsqueak compared to its Treasury and corporate counterparts, but muni numbers are nothing to sneeze at. In 2018, the U.S. muni bond market had a total value of $3.8 trillion and about $11.6 billion worth of munis were traded each day, according to the Municipal Securities Rulemaking Board.

By comparison, the corporate debt market totaled $9.2 trillion in 2018 and about $31.2 billion in corporate bonds traded each day.

What Do Muni Bonds Yield, and How Has the Market Performed?

Muni bond rates vary depending on the creditworthiness of the entity selling the bonds. The most creditworthy muni bond issuers—those with the lowest risk of default—pay lower rates than the less creditworthy, which carry a greater risk of default. An AAA-rated muni bond—the highest possible rating—pays a lower rate than an A-rated muni.

As of late December 2019, U.S. yields for 5-year and 10-year muni bonds averaged about 1.15% and 1.5%, respectively, according to Bloomberg data. By comparison, 5-year and 10-year Treasuries yielded 1.73% and 1.92%, respectively.

As for returns, muni bonds in recent years had a solid, if unspectacular, performance in the broader market scheme of things. The S&P Municipal Bond Index, which reflects the performance of more than 200,000 bonds, had posted a return of about 7.2% for the year through late December 2019. The S&P 500 Index, which represents the U.S. stock market, was up 28% for the year.

Over the long term, muni bond returns also lagged the S&P 500 and did only a little better than the rate of inflation. The S&P Municipal Bond Index posted an average annualized five-year return of 3.6% and an average 10-year return of 4.4%. (Yields and other information on specific muni bonds can be found by using the TD Ameritrade Bond Wizard).

Municipal bonds types
For illustrative purposes only.

What Are the Tax Benefits of Muni Bonds and Other Tax Implications of Muni Bonds?

Interest earned on corporate or Treasury bonds is taxable, but that’s not the case for most muni bonds. For investors, “the main advantage of investing in municipal bonds is earning tax-free interest,” Shamailov said.

When comparing municipal bonds to other investments, she suggested investors consider “taxable equivalent yield,” also called the after-tax yield.

The after-tax yield accounts for tax consequences incurred by either a capital gain or ordinary income, and because the interest on most municipal bonds is excluded from federal income taxes, the tax savings to the investor vary depending on an investor’s tax bracket and the yield on the bond.

For example, an investor in the 35% federal tax bracket considering a muni bond with a 3% yield would have to earn 4.61% on a taxable investment to equate to the 3% tax-free investment.

In this example, the taxable equivalent yield “is being factored using only the federal income tax exemptions,” Shamailov said. “State and local exemption would push the taxable equivalent yields on municipals higher, which would improve the appeal to investors in lower tax brackets.”

In other words, muni bonds aren’t free lunch. Investors should understand the potential tax implications before they dive into the muni market.

TD Ameritrade does not provide tax advice. We suggest you consult with a tax-planning professional with regard to your personal circumstances.

What Are the Risks of Investing in Muni Bonds?

The primary risk in muni bonds is an issuer default—for example if a city or other government body goes bankrupt or otherwise can’t pay its debts. That’s a relatively rare occurrence in the muni bond market.

In 2018, the default rate for investment-grade municipal bonds was 0.18% compared to 1.74% for investment-grade corporate bonds, according to the Municipal Securities Rulemaking Board.

Other risks include opportunity cost, meaning muni returns could be lower than what you might have received if you invested in something with a higher risk/return factor. And, although certain muni bonds are exempt from federal, state, and local taxes, interest income may still be subject to the alternative minimum tax (AMT).

Muni interest income could also negatively affect Social Security benefits because the IRS considers those payments as income when calculating taxes on Social Security benefits.

Are Muni Bonds More Appropriate for Some Types of Investors?

“Historically, tax-exempt muni bonds have been favored by investors in higher tax brackets,” Shamailov said. “But investors in lower tax brackets can also reap the benefits of munis.”

Again, the interest earned on munis is exempt from federal income tax and, in many cases, is also exempt from state and local taxes for investors residing in the state where the bond was purchased. Tax-free munis may also appeal to investors in retirement or approaching retirement.

Looking for Baby Bonds?

TD Ameritrade will be rolling out a new service in late January. We will be offering new issuances across the states, and clients can also sign up to receive alerts when new issues are posted online. This will give clients the opportunity to participate in new issue offerings as they come to market.

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Key Takeaways

  • Municipal bonds are interest-bearing debt obligations sold by a government entity to finance capital projects
  • Interest earned on muni bonds is typically exempt from federal taxes and, in some cases, exempt from state and local taxes

  • Muni bond rates vary depending on the creditworthiness of the issuer; as with other bonds, there is a risk of default

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