๐ฆ๐ฒ๐ฝ๐๐ฒ๐บ๐ฏ๐ฒ๐ฟ ๐ฎ๐ฌ๐ฎ๐ฒ ๐ฃ๐ฒ๐ฟ๐ณ๐ผ๐ฟ๐บ๐ฎ๐ป๐ฐ๐ฒ ๐ข๐๐ฒ๐ฟ๐๐ถ๐ฒ๐
The
@SPGlobal Municipal Bond Investment Grade Index returned -3.867% in September, as sharply higher municipal yields drove broad-based price declines and pushed year-to-date returns into negative territory. Municipal yields rose significantly more than Treasury yields during the month, with short-term yields increasing nearly 100 basis points, the largest single-month increase in the 23-year history of the
@ICE_Markets U.S. Municipal AAA Noncallable yield curve.
๐ข๐๐ต๐ฒ๐ฟ ๐๐ถ๐ด๐ต๐น๐ถ๐ด๐ต๐๐
๐ฅ๐ฎ๐๐ฒ๐ ๐ฎ๐ป๐ฑ ๐๐๐ฟ๐๐ฒ ๐๐๐ป๐ฎ๐บ๐ถ๐ฐ๐: Municipal yields moved sharply higher in September, while the yield curve flattened slightly as shorter maturities experienced larger yield increases than longer maturities.
๐๐ฟ๐ฒ๐ฑ๐ถ๐ ๐ก๐ฎ๐บ๐ฒ๐ ๐๐ถ๐๐ต ๐ฆ๐ฝ๐ฟ๐ฒ๐ฎ๐ฑ ๐ ๐ผ๐๐ฒ๐: The State of Washington, State of Massachusetts, and State of New York saw notable spread tightening, while New York State Housing Finance Agency Affordable Housing Revenue Bonds, CommonSpirit Health, and Virginia Housing Development Authority experienced meaningful spread widening.
๐ฆ๐ฒ๐ฐ๐๐ผ๐ฟ ๐ฎ๐ป๐ฑ ๐ฆ๐ฝ๐ฟ๐ฒ๐ฎ๐ฑ: Tobacco Settlement, Public Power, and Resource Recovery sectors benefited from spread tightening, while the Prerefunded/ETM sector experienced spread widening.
๐ฆ๐๐ฎ๐๐ฒ ๐ฃ๐ฒ๐ฟ๐ณ๐ผ๐ฟ๐บ๐ฎ๐ป๐ฐ๐ฒ: Washington, Alabama, Georgia, and Ohio led state returns, with states with shorter average durations generally outperforming in the rising-rate environment.
๐ ๐ผ๐ป๐๐ต๐น๐ ๐ฆ๐ฝ๐ผ๐ ๐๐๐ฟ๐๐ฒ: The ICE U.S. Municipal AAA Noncallable spot curve increased approximately 70 basis points at the ten-year maturity, reflecting substantial upward pressure on municipal rates during the month (see figure).
Read the full
@Invtools report by Joel Buursma, CIPM and Mark Pinson:

ALT The September 2026 Municipal Bond Market Performance Report for Investortools, Inc. by Joel Buursma, VP & Senior Software Architect, and Mark Pinson, Index Production and Analysis. All table data and figures in this report were produced using Investortools, Inc.โs Custom Index Managerโข product.