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Key takeaways
- Investors poured $2.3B into muni funds and ETFs, the second-best weekly flow since 1992, bringing the total YTD to nearly $40B.
- High yield has gathered $5.7B YTD — among the top 5 best starts to the year since 1992.
- Nuveen views any supply-driven softness as a compelling entry-point, supported by credit resiliency, and enduring investor demand.
Market recap
Municipal bonds delivered an exceptional week, with the broad muni index returning 0.80% amid a confluence of macro and technical forces. A tentative U.S.-Iran truce paired with softer growth and core U.S. inflation data drove yields sharply lower across the curve. May’s month-to-date performance returned to positive territory, and munis outperformed Treasuries last week — pushing valuations to richer levels — but leaving taxable equivalent yields highly attractive to investors. Insatiable demand drove $2.3B into municipal funds and ETFs — the second-best weekly flow on record, underscoring sustained conviction among investors. While heavy June new issuance could test the market, robust principal and coupon reinvestment are expected to provide meaningful technical support. Any weakness from heavy supply should present buying opportunities, as we continue to expect enduring credit fundamentals and solid investor demand.
How is supply trending?
A slower $8.9B in new deals last week attracted solid demand, particularly in longer-maturity and lower rated credits.
Market impact: Demand outstripped supply driving positive results and tighter spreads.
What do yields look like?
Rates moved lower last week across the curve and municipal yields fell more than Treasuries, outperforming on the week.
| Municipal market yield (%) | Current (%) | Change (bps) | Ratio (%) |
|---|---|---|---|
| 5-year | 2.66 | -11 | 64% |
| 10-year | 3.02 | -12 | 68% |
| 30-year | 4.38 | -12 | 88% |
| Source: MMD, Bloomberg, L.P.; data from 22 May 2026–28 May 2026. | |||
What are flows doing?
Municipals gathered $2.3B, the second-best weekly flow on record, with continued focus on long-term and high yield strategies.
| OEFs | $671M | ||
| ETFs | $1.66B | ||
| Long-term Funds | $1.61B | ||
| High Yield Funds | $312M | ||
| Source: LSEG Lipper, data from 21 May 2026–27 May 2026. | |||
Tax-efficient yields are more attractive in longer-maturity municipals.
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Endnotes
Sources
Performance: Bloomberg, L.P. Issuance: J.P. Morgan, 28 May 2026. Fund flows: Lipper and J.P. Morgan. The sum of OEFs and ETFs represent the total municipal flows.
Any reference to credit ratings refers to the highest rating given by one of the following national rating agencies: S&P, Moody’s or Fitch. Credit ratings are subject to change. AAA, AA, A and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings.
This material is not intended to be a recommendation or investment advice, does not constitute a solicitation to buy, sell or hold a security or investment strategy, and is not provided in a fiduciary capacity. The information provided does not take into account the specific objectives or circumstances of any particular investor or suggest any specific course of action. Investment decisions should be made based on an investor’s objectives and circumstances and in consultation with his or her advisors.
Representative indexes: Muni bond 5-year: Bloomberg Municipal Bond 5 Year (4–6) Index; Muni bond 10-year: Bloomberg Municipal Bond 10 Year (8–12) Index; Muni bond 15-year: Bloomberg Municipal Bond 15 Year (12–17) Index; Muni long bond: Bloomberg Municipal Long Bond (22+) Index; Muni bond 3–15 year blend: Bloomberg Municipal 3–15 year blend (2–17) Index; Muni AAA: Bloomberg Municipal AAA Index; Muni AA: Bloomberg Municipal AA Index; Muni A: Bloomberg Municipal A Index; Muni BBB: Bloomberg Municipal BBB Index; Muni Agg (1-30) bond: Bloomberg Municipal Bond Index; Muni high yield: Bloomberg High Yield Municipal Index; U.S. aggregate bond: Bloomberg U.S. Aggregate Bond Index; U.S. Treasury: Bloomberg U.S. Treasury Index; U.S. government related: Bloomberg U.S. Government-Related Index; U.S. corporate investment grade: Bloomberg U.S. Corporate Index; U.S. high yield corporate: Bloomberg U.S. Corporate High Yield Index; Taxable municipals: Bloomberg Taxable Municipal Index.
This material, along with any views and opinions expressed within, are presented for informational and educational purposes only as of the date of production/writing and may change without notice at any time based on numerous factors, such as changing market, economic, political, or other conditions, legal and regulatory developments, additional risks and uncertainties and may not come to pass. There is no promise, representation, or warranty (express or implied) as to the past, future, or current accuracy, reliability or completeness of, nor liability for, decisions based on such information, and it should not be relied on as such. This material should not be regarded by the recipients as a substitute for the exercise of their own judgment. It is important to review your investment objectives, risk tolerance and liquidity needs before choosing an investment style or manager.
This material may contain “forward-looking” information that is not purely historical in nature. Such information may include, among other things, projections, forecasts, estimates of yields and/or market returns, and proposed or expected portfolio composition. No representation is made that the performance presented will be achieved, or that every assumption made in achieving, calculating or presenting either the forward-looking information or the historical performance information herein has been considered or stated in preparing this material. Any changes to assumptions that may have been made in preparing this material could have a material impact on any of the data and/or information presented herein by way of example.
For term definitions and index descriptions, please access the glossary on nuveen.com. Please note, it is not possible to invest directly in an index.
Important information on risk
Past performance is no guarantee of future results. All investments carry a certain degree of risk, including the possible loss of principal, and there is no assurance that an investment will provide positive performance over any period of time. Certain products and services may not be available to all entities or persons. There is no guarantee that investment objectives will be achieved.
Investing in fixed income investments involves risks such as market risk, credit risk, interest rate/duration risk, call risk, tax risk, political and economic risk, derivatives risk, and income risk. Credit risk refers to an issuers ability to make interest and principal payments when due. Typically, the value of, and income generated by, fixed income investments will decrease, or increase based on changes in market interest rates. As interest rates rise, bond prices fall and as interest rates fall, bond prices rise. Income is only one component of performance and investors should consider all of the risk factors for an asset class before investing.
Investing in municipal bonds involves risks such as market risk, credit risk, interest rate/duration risk, call risk, tax risk, political and economic risk, derivatives risk, and income risk. Credit risk refers to an ability to make interest and principal payments when due. Typically, the value of, and income generated by, muni bonds will decrease, or increase based on changes in market interest rates. As interest rates rise, bond prices fall and as interest rates fall, bond prices rise. Income is only one component of performance and investors should consider all of the risk factors for an asset class before investing. Income is generally exempt from regular federal income tax and may be subject to state and local taxes, based on the investor’s state of residence, as well as to the federal alternative minimum tax (AMT). Capital gains, if any, are subject to tax. Income from municipal bonds could be declared taxable because of unfavorable changes in tax laws, adverse interpretations by the Internal Revenue Service or state tax authorities, or noncompliant conduct of a bond issuer. Please contact a tax professional regarding the suitability of tax-exempt investments as this information should not replace a client’s consultation with a financial/tax professional regarding their tax situation. Nuveen and its investment specialists do not provide tax advice.
Taxable-equivalent yields are based on the highest individual marginal federal tax rate of 37%, plus the 3.8% Medicare tax on investment income. Individual tax rates may vary.
Nuveen, LLC provides investment solutions through its investment specialists.
This information does not constitute investment research as defined under MiFID.
