Key takeaways
- Heavy month-end supply outweighed reinvestment demand, pressuring municipal performance last week.
- September reinvestment wave could offset new supply, potentially supporting municipal bonds ahead.
- Steeper curve may reward investors willing to extend duration for higher yields.
Muni market recap
Municipal bonds faced pressure last week, dipped slightly lower by 0.06%, as heavy new bond supply met thin reinvestment demand – a seasonal pattern common at month-end. Short-term yields edged lower, while intermediate and longer-term yields rose, steepening the yield curve. That steeper curve is rewarding investors who extend duration, offering more yield for taking on modest additional risk, in our view. Despite this week’s softness, investor demand remained resilient. Money continued flowing into municipal funds every day last week, a sign that elevated yields are still attracting attention despite any broader market uncertainty. Looking ahead, we believe the setup is shifting in munis’ favor. September 1st brings a wave of reinvestment dollars back into the market, which will be beneficial alongside inflows. As we look ahead, that combination of fresh cash could provide meaningful support, building on the steady inflows we’ve already seen last week.
How is supply trending?
August supply is tracking toward roughly $59 billion, which would rank as the second largest month on record for tax-exempt issuance, trailing October 2020.
Market impact: Less intra-month reinvestment dollars and an outsized issuance calendar has placed more importance on investor demand via inflows to support performance.
Municipal market returns (%)
| Index returns by maturity | WTD | MTD | YTD |
|---|---|---|---|
| Muni Agg | -0.06% | 0.16% | 0.58% |
| Muni bond 5-year | 0.07% | 0.68% | 0.86% |
| Muni bond 10-year | 0.00% | 0.54% | -0.27% |
| Muni bond 15-year | -0.21% | -0.24% | -0.62% |
| Muni long bond (22+) | -0.12% | -0.29% | 1.14% |
| Muni bond 3-15-year blend | -0.02% | 0.41% | 0.17% |
| Source: Bloomberg L.P., 27 Aug 2026. Performance data shown represents past performance and does not predict or guarantee future results. All index returns are Bloomberg; shown in U.S. dollars. | |||
What do muni yields look like this week?
Municipal yield curve grew steeper during the week, while elevated absolute yields continue to garner investor interest.
| Municipal market yields (%) | Current (%) | Change (bps) | Ratio (%) |
|---|---|---|---|
| 5Y | 2.78 | -2 | 63% |
| 10Y | 3.31 | 0 | 71% |
| 30Y | 4.55 | +3 | 88% |
| Source: MMD, Bloomberg, L.P.; data from 21 Aug 2026–27 Aug 2026. | |||
What are municipal bond flows doing?
Municipal funds received positive flows each day last week, with munis gathering $1.44B as investors favored ETFs and long-term funds.
| OEFs | $236M | ||
| ETFs | $1.21B | ||
| Long-term funds | $878M | ||
| High yield funds | $303M | ||
| Source: LSEG Lipper, J.P. Morgan data from 20 Aug 2026 – 27 Aug 2026. The summation of OEFs + ETFs represents the total flows. | |||
Taxable equivalent yields are more attractive in longer-maturity municipals.
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Endnotes
Sources
Performance: Bloomberg, L.P. Issuance: S&P Ipreo. 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.
