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  • Muni Nation

    Muni Bond Upgrades Prevail

    Michael Cohick, Senior ETF Product Manager
    September 26, 2017

    Updated statistics from Moody's Investors Service1 confirm two benefits muni bonds continue to provide. First, municipal credits remain highly rated with, in 2016, upgrades narrowly outpacing downgrades.2 Second, municipal bankruptcies and defaults remain rare.

    On June 27, 2017, Moody's released its updated annual default research report using 2016 figures. The study encompasses data on all Moody's rated U.S. municipal bonds for the 46 year period from 1970 through the end of 2016.

    The latest report features two changes from prior years. Most notably Moody's framework shifted from being security-based to being sector-focused, to better capture "inherent credit distinctions and ratings volatility in the municipal sector." The upshot of this is that the Moody's universe is now split into three broad sectors: 1) General Governments, 2) Municipal Utilities, and 3) Competitive Enterprises.

    To save you the trouble of diving into the 101-page document, we have identified three key takeaways.

    Muni Bond Ratings Drifted More Positively in 2016

    Overall, Moody's bond ratings for the municipal sector skewed slightly more towards notch-weighted3 "upgrades" than "downgrades" in 2016, in an environment that continued to see elevated downgrade levels. Although the change is slight, this marks a turning point for muni bond rating drift, as "notch-weighted downgrades have outpaced upgrades for every monthly cohort since mid-2008," with the trend only reversing quite recently. For Moody's, this trend lends credence to the idea that "most credits are recovering or are stable in the aftermath of the recession." However, there are still some that "face steep credit challenges."

    Muni Defaults and Bankruptcies Remain Quite Rare

    Defaults in the muni space are still rarities when viewed in the context of the larger bond market, and global corporates in particular.

    Municipal Default Rates Lower Than Global Corporates for All Broad Categories
    Average Cumulative Default Rates, 1970-2016, Municipals vs. Global Corporates

    Municipal Default Rates Lower Than Global Corporates for All Broad Categorie Chart

    *Average cumulative rates from 1970-2016 (annualized). Most recent annual study published July 2016, based on data from 1970-2016.
    Source: Moody's Investors Service: "U.S. Municipal Bond Defaults and Recoveries, 1970-2016"

    Historical information is not indicative of future results; current data may differ from data quoted.
    The Moody's rating scale is as follows, from excellent (high grade) to poor (including default): Aaa to C, with intermediate ratings offered at each level between Aa and Caa. Anything lower than a Baa rating is considered a non-investment-grade or high-yield bond.

    Out of the many thousands of rated muni bonds issued since 1970, there have been just 103 defaults. Of these, 72.8% were accounted for by competitive enterprises (revenue-supported healthcare, housing, and higher education), 20.4% by general governments, and just 6.8% by municipal utilities. Perhaps not surprisingly, most of the competitive enterprise defaults occurred during the period 2004-2008 as the housing sector became stressed.

    Although the report observes that "the U.S. public finance sector is notable for infrequent defaults and extraordinary stability," it does see changes on the horizon for the sector. The report goes on to state that "rating volatility, rating transition rates, cumulative default rates have all increased since 2007." Because their revenues and expenditures are "delinked," municipal governments have some flexibility when budgets become stressed. However, when push comes to shove, their first priority may not be re-paying bondholders. "A municipal government," Moody's observes, "will very likely choose to maintain basic services, pay teachers and policemen before bondholders."

    Puerto Rico Responsible for the Four Muni Defaults in 2016

    Debt troubles continued to plague the island commonwealth of Puerto Rico in 2016. The report notes that while these defaults were very small in number, when compared to the overall municipal bond universe, the sums involved were "extremely large in terms of debt affected."

    Taken together, the defaults by the four Puerto Rican entities — the Puerto Rico Infrastructure Finance Authority (PRIFA), the Government Development Bank (GDB), the Highways and Transportation Authority, and Puerto Rico's General Obligation debt — affected $22.6 billion in rated debt through the end of 2016. The report noted that this made it "the largest annual default by a single U.S. municipal credit family in Moody's history." Moody's sees Puerto Rico's number of individual defaults rising in 2017, and that these could total as high as $64.3 billion by the end of the year.

    Conclusion: Muni Bond Investments are Attractive

    We believe that the findings in the Moody's report underline the attractiveness of the muni bond asset class for investors. Just the two benefits we have noted, that muni credits remain highly rated and that muni bankruptcies and defaults remain rare overall, should lead investors seriously to consider munis as a portfolio investment. And these benefits are in addition to the tax advantages an investment in muni bonds also offers.


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    Municipal bonds are subject to risks related to litigation, legislation, political change, conditions in underlying sectors or in local business communities and economies, bankruptcy or other changes in the issuer’s financial condition, and/or the discontinuance of taxes supporting the project or assets or the inability to collect revenues for the project or from the assets. Bonds and bond funds will decrease in value as interest rates rise. Additional risks include credit, interest rate, call, reinvestment, tax, market and lease obligation risk. High-yield municipal bonds are subject to greater risk of loss of income and principal than higher-rated securities, and are likely to be more sensitive to adverse economic changes or individual municipal developments than those of higher-rated securities. Municipal bonds may be less liquid than taxable bonds.

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