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MARKETS
March 05, 2025

Weekly Municipal Monitor—Yield Curve Reverts

By Sam Weitzman

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Macros, Markets and Munis

Munis posted positive returns last week as Treasuries rallied, moving 19-25 basis points (bps) lower across the yield curve. Muni yields then moved lower with Treasuries last week and underperformed amid elevated supply conditions. Fixed-income yields rose amid a broader risk-off sentiment in equities surrounding growth concerns, coinciding with generally weaker economic data. Weaker manufacturing data in particular led the week, followed by January Personal Consumption Expenditures (PCE) price index inflation readings, which declined from prior-month levels to 2.5% year-over-year (YoY). Meanwhile, muni supply and demand trends remained elevated. As the short-term muni rate declined nearly 1% last week, this week we highlight the year-to-date (YTD) disinversion of the muni yield curve.

Supply and Demand Remain Positive

Fund Flows (up $785 million): During the week ending February 26, weekly reporting municipal mutual funds recorded $785 million of net inflows, according to Lipper. Long-term funds recorded $696 million of inflows, intermediate funds recorded $52 million of outflows and high-yield funds recorded $42 million of inflows. Last week’s inflows marked a sixth consecutive week of inflows and led YTD inflows higher to $8 billion.

Supply (YTD supply of $77 billion; up 41% YoY): The muni market recorded $10 billion of new-issue supply last week, up 15% from the prior week. YTD, the muni market has recorded $77 billion of new issuance, up 41% YoY. This week’s calendar is expected to increase to $14 billion. The largest deals include $1.5 billion State of New York and $1.2 billion University of California transactions.

This Week in Munis: Yield Curve Reverts

While fixed-income yields rallied last week amid growth concerns that drove risk-off sentiment, municipal short-term rates moved particularly lower. The one-week tax-exempt municipal index declined nearly 100 bps from 2.91% to 1.86%, according to SIFMA. The sharp short-end move supported a continued reversion of the municipal yield curve, which has generally been inverted since the Federal Reserve began its hiking cycle in early 2023.

Exhibit 1: AAA Municipal Yield Curve Change YTD
AAA Municipal Yield Curve Change YTD
Source: Bloomberg, Western Asset, SIFMA, Bloomberg AAA Callable Yield Curve. As of 28 Feb 25. Select the image to expand the view.

The normalization of the yield curve, and the return of the term premium across the curve has resulted in better relative income opportunities in intermediate and long maturities. At February month-end, the long end of the AAA curve now offers a 200-bp yield advantage versus the one-week SIFMA rate, compared to the 39-bp average observed from January 2023 through February 2025. For short-to-intermediate municipal holders, the curve movement provides not only relative income opportunities, but a return of “roll-down” price support from bonds approaching lower yields as they approach maturity.

Western Asset expects that the curve reversion will provide more opportunities for bulleted curve allocations, such as laddered strategies which had underperformed bar-belled allocations last year. Should short-end yields remain low, the economics of levered tax-exempt structures (e.g., closed-end funds and tender option bonds) would also stand to benefit. Lastly, we expect that lower short-term yields could contribute to greater longer-term muni fund demand, as short-term muni investors consider reallocating to relatively higher income opportunities further out the curve.

Municipal Credit Curves and Relative Value

Exhibit 2: Muni Credit Curves
Muni Credit Curves
Source: Bloomberg, Western Asset. As of 28 Feb 25. Bloomberg Valuation Service (BVAL) Municipal Credit Indices (AAA, AA, A, BBB, respectively) and US Sovereign Curves. Taxable-Equivalent Muni Credit Curves consider the top marginal effective tax rate of 40.8%. AA Muni is represented by the US General Obligation AA Muni BVAL Yield Curve. The BVAL curve is populated with pricing from uninsured AA General Obligation bonds. A Muni is represented by the US General Obligation A Muni BVAL Yield Curve. The BVAL curve is populated with pricing from uninsured A General Obligation bonds. BBB Muni is represented by the US General Obligation BBB Muni BVAL Yield Curve. The BVAL curve is populated with pricing from uninsured BBB General Obligation bonds. Indices are unmanaged and one cannot directly invest in them. They do not include fees, expenses or sales charges. Past performance is not an indicator or a guarantee of future results. Select the image to expand the view.
Exhibit 3: Taxable-Equivalent Muni Credit Curves
Taxable-Equivalent Muni Credit Curves
Source: Bloomberg, Western Asset. As of 28 Feb 25. Bloomberg Valuation Service (BVAL) Municipal Credit Indices (AAA, AA, A, BBB, respectively) and US Sovereign Curves. Taxable-Equivalent Muni Credit Curves consider the top marginal effective tax rate of 40.8%. AA Muni is represented by the US General Obligation AA Muni BVAL Yield Curve. The BVAL curve is populated with pricing from uninsured AA General Obligation bonds. A Muni is represented by the US General Obligation A Muni BVAL Yield Curve. The BVAL curve is populated with pricing from uninsured A General Obligation bonds. BBB Muni is represented by the US General Obligation BBB Muni BVAL Yield Curve. The BVAL curve is populated with pricing from uninsured BBB General Obligation bonds. Indices are unmanaged and one cannot directly invest in them. They do not include fees, expenses or sales charges. Past performance is not an indicator or a guarantee of future results. Select the image to expand the view.
Exhibit 4: AAA Munis vs. Treasuries
AAA Munis vs. Treasuries
Source: Muni Yields: Thomson Reuters MMD, Treasury Yields: Bloomberg. As of 28 Feb 25. Past performance is not a guarantee of future results. It is not possible to invest directly in an index. Select the image to expand the view.
Exhibit 5: Tax-Exempt and Taxable Muni Valuations
Tax-Exempt and Taxable Muni Valuations
Source: Bloomberg, Western Asset. As of 28 Feb 25. Yield-to-worst (YTW) is the lowest potential yield that can be received on a bond without the issuer actually defaulting. AAA, AA, A, BBB Corporate Indices; After-Tax Yield assumes a top effective tax rate of 40.8%. Taxable Muni Index Corporate comparable used is the Global Corporate Aggregate (ex. BBB) to better align credit quality and duration. Select the image to expand the view.

Western Asset Key Themes for Muni Investors

Theme #1: Municipal taxable-equivalent yields and income opportunities remain above decade averages.

Exhibit 6: Muni and Taxable-Equivalent Muni Yield-to-Worst
Muni and Taxable-Equivalent Muni Yield-to-Worst
Source: Bloomberg, Western Asset. As of As of 28 Feb 25. Bloomberg Municipal Bond Index yield considering highest marginal tax rate of 40.8%. Indexes are unmanaged and one cannot directly invest in them. They do not include fees, expenses or sales charges. Past performance is not an indicator or a guarantee of future results. Select the image to expand the view.

Theme #2: The muni curve has steepened, offering better value in longer maturities.

Exhibit 7: AAA Municipal vs. Treasury Yield Curves
AAA Municipal vs. Treasury Yield Curves
Source: Bloomberg, Western Asset. As of 28 Feb 25. Bloomberg Valuation Service (BVAL) AAA Muni Curve and US On-/Off-the-Run Sovereign Curve. Indexes are unmanaged and one cannot directly invest in them. They do not include fees, expenses or sales charges. Past performance is not an indicator or a guarantee of future results. Select the image to expand the view.

Theme #3: Munis offer attractive after-tax yield pickup versus longer-dated Treasuries and investment-grade corporate credit.

Exhibit 8: Municipal vs. Taxable Fixed-Income Yields by Quality
Municipal vs. Taxable Fixed-Income Yields by Quality
Source: Western Asset, Bloomberg. As 28 Feb 25. 10- and 30-Year comparison reflects Bloomberg Valuation Service (BVAL) AAA Muni Curve and US On-/Off-the-Run Sovereign Curve. AA Muni reflects the Bloomberg AA Muni Bond Index. A Muni reflects the Bloomberg A Muni Bond Index. BBB Muni reflects the Bloomberg BBB Muni Bond Index. HY Muni reflects the Bloomberg High Yield Muni Bond Index. AA Corp reflects the Bloomberg AA Corporate Bond Index. A Corp reflects the Bloomberg A Corporate Bond Index. BBB Corp reflects the Bloomberg BBB Corporate Bond Index. After-tax yield considers top marginal tax rate of 40.8%. Indexes are unmanaged and one cannot directly invest in them. They do not include fees, expenses or sales charges. Past performance is not an indicator or a guarantee of future results. Select the image to expand the view.

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