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MARKETS
15 April 2025

Weekly Municipal Monitor—Unprecedented Volatility

By Sam Weitzman

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Macros, Markets and Munis

The municipal market sold off sharply last week, with Treasuries moving 30-50 basis points (bps) higher across the yield curve while munis generally underperformed amid weak demand and elevated supply conditions. Market volatility spiked last week, and municipals experienced one of the most volatile weeks in history as equities sold off sharply and fixed-income yields moved higher amid heightened recessionary and inflationary fears associated with new tariff policies. Meanwhile, technicals were challenged by record outflows and the elevated supply. This week we highlight the record volatility observed last week in the muni market and attractive income opportunities.

Fund Outflows Accelerated Amid Broader Market Volatility

Fund Flows (down $3.3 billion): During the week ending April 9, weekly reporting municipal mutual funds recorded $3.3 billion of net outflows, according to Lipper. Long-term funds recorded $2.6 billion of outflows, intermediate funds recorded $297 million of outflows and high-yield funds recorded $759 million of outflows. Last week’s outflows represented a record weekly outflow level and led year-to-date (YTD) inflows lower to $7 billion.

Supply (YTD supply of $141 billion; up 33% YoY): The muni market recorded $8 billion of new-issue supply last week, down 39% from the prior week. YTD, the muni market recorded $141 billion of new issuance, up 33% year-over-year (YoY). Tax-exempt and taxable issuance are up 33% and 34% this year, respectively, though tax-exempt issuance has comprised the vast majority (95%) of YTD supply. This week’s calendar is expected to increase to remain elevated at $12 billion. The largest deals include $1.75 billion taxable New York City General Obligations and $1.6 billion Connecticut General Obligation transactions.

This Week in Munis: Unprecedented Volatility

The municipal market experienced unprecedented volatility last week. AAA Municipal Market Data (MMD) Index yields moved up by 20-42 bps each day from Monday to Wednesday, before dropping sharply by 45-48 bps on Thursday, only to rise again by 25-26 bps on Friday. All told, the AAA municipal yield curve had increased by 65-78 bps higher during the week, exceeding the 45-50-bp rise observed in commensurate maturity Treasury yields.

Exhibit 1: Daily AAA Muni Yield Changes
Daily AAA Muni Yield Changes
Source: Western Asset, Thomson Reuters Municipal Market Data (MMD). As of 11 Apr 25. Select the image to expand the view.

Western Asset does not consider the recent tariff measures to be a widespread negative credit event for most municipal market issuers; instead, we attribute the significant price volatility to liquidity challenges. The municipal bond market is fragmented and typically experiences relatively limited trading activity, which can lead to underperformance during periods of short-term market volatility. We believe that a confluence of rate volatility, rebalancing associated with equity market drawdowns, and tax season selling pressures all contributed to the weekly record $3.3 billion fund outflows and relative weakness during the week.

Exhibit 2: Municipal Bond Fund Flows vs. Investment Yields
Municipal Bond Fund Flows vs. Investment Yields
Source: ICI, Bloomberg, Western Asset. As of 11 Apr 25. Select the image to expand the view.

Liquidity events in the municipal market have historically contributed to attractive tax-exempt income opportunities and the potential for longer-term after-tax outperformance. This week, the yield on the Bloomberg Municipal Bond Index increased by 67 bps to 4.29%, enhancing tax-adjusted income opportunities. For the highest bracket of taxpayers, the average taxable equivalent yields in New York and California approached 9.0%. Additionally, when considering only the top federal tax rate, 10-year AAA municipal securities now offer 91 bps of excess yield pickup compared to Treasuries, while BBB municipals provide 156 bps of after-tax yield pickup compared to BBB corporates. Given our expectation that municipal credit fundamentals are likely to remain sound, we believe this represents an attractive risk-adjusted value opportunity, especially in light of the broader market volatility.

Exhibit 3: YTD Change in Tax-Exempt, Taxable Equivalent Yields (TEY)
YTD Change in Tax-Exempt, Taxable Equivalent Yields (TEY)
Source: Bloomberg, Western Asset. As of 11 Apr 25. TEY considers the top federal tax bracket for the national index and top federal and state tax brackets for the NY and CA indices. Select the image to expand the view.

Municipal Credit Curves and Relative Value

Exhibit 4: Muni Credit Curves
Muni Credit Curves
Source: Bloomberg, Western Asset. As of 11 Apr 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 5: Taxable-Equivalent Muni Credit Curves
Taxable-Equivalent Muni Credit Curves
Source: Bloomberg, Western Asset. As of 11 Apr 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 6: AAA Munis vs. Treasuries
AAA Munis vs. Treasuries
Source: Muni Yields: Thomson Reuters MMD, Treasury Yields: Bloomberg. As of 11 Apr 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 7: Tax-Exempt and Taxable Muni Valuations
Tax-Exempt and Taxable Muni Valuations
Source: Bloomberg, Western Asset. As of 11 Apr 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 spiked to decade-high levels.

Exhibit 8: Muni and Taxable-Equivalent Muni Yield-to-Worst
Muni and Taxable-Equivalent Muni Yield-to-Worst
Source: Bloomberg, Western Asset. As of 11 Apr 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 intermediate and longer maturities.

Exhibit 9: AAA Municipal vs. Treasury Yield Curves
AAA Municipal vs. Treasury Yield Curves
Source: Bloomberg, Western Asset. As of 11 Apr 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 10: Municipal vs. Taxable Fixed-Income Yields by Quality
Municipal vs. Taxable Fixed-Income Yields by Quality
Source: Western Asset, Bloomberg. As 11 Apr 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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