# Portfolio overlap — MMIDX vs RTHAX Comparing **MFS Municipal Income Fund** (2026-03-31) and **Tax-Exempt High Yield Bond Fund** (2026-04-30). - Shared positions: 311 - MFS Municipal Income Fund covered by Tax-Exempt High Yield Bond Fund: 0.09093761925274742092916933054 - Tax-Exempt High Yield Bond Fund covered by MFS Municipal Income Fund: 0.09093761925274742092916933053 ## MFS Municipal Income Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | MFS Institutional Money Market Portfolio, Class A | 0.024361 | | | Black Belt Energy Gas District | 0.005283 | ✓ | | TEXAS ST MUNI GAS ACQUISITION& TEXAS MUNICIPAL GAS ACQUISITION & SUPPLY CORP IV | 0.004699 | | | PRINCETON TX INDEP SCH DIST | 0.004287 | | | NY TRANS CORP(JFK INT NEW ONE)/AGM 5.25% 6/30/60@ | 0.004217 | | | NY TRANS CORP(JFK INT NEW ONE)/AGM 5.13% 6/30/60@ | 0.004200 | | | New Hampshire Business Finance Authority, Series 2023A | 0.004140 | | | California (State of) Community Choice Financing Authority (Green Bonds), Series 2023 C, RB | 0.004015 | ✓ | | BLACK BELT ENGY GAS-C | 0.003628 | | | NOVANT HEALTH OBLIGATED GROUP 5.5% 06-01-50 | 0.003512 | | | PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000 | 0.003356 | ✓ | | VIRGINIA ST HSG DEV AUTH | 0.003157 | | | PENNSYLVANIA ST ECON DEV FING REGD OID B/E AMT AG 5.00000000 | 0.003155 | ✓ | | QUEEN CREEK AZ COPS | 0.003133 | | | Connecticut State Health & Educational Facilities Authority, Series A | 0.003092 | | | METROCARE SVC REV | 0.003070 | ✓ | | NY TRANSPRTN DEV CORP | 0.002999 | ✓ | | MD HLTH HGR AUTH-A | 0.002973 | | | WV HOSP 5.375% 9/1/2053 | 0.002961 | | | TENNERGY CORP TN GAS REVENUE TGYPWR 10/53 ADJUSTABLE VAR | 0.002956 | | | JEA WTR & SWR REV-A | 0.002955 | | | Black Belt Energy Gas District, Series 2025 A | 0.002908 | | | Delaware State Housing Authority, Series BDS 2023 | 0.002882 | | | TX PRIVATE ACTIVITY | 0.002788 | ✓ | | Energy Southeast Cooperative District, Alabama, Energy Supply Revenue Bonds, Series 2025B | 0.002783 | | | Alachua County Health Facilities Authority, Series 2025 A | 0.002767 | | | Southeast Energy Authority, Alabama, Commodity Supply Revenue Bonds, Project 5, Series 2023A | 0.002756 | | | TOWER HEALTH OBLIGATED GROUP 5.0% 06-30-39 | 0.002649 | ✓ | | MAIN STR NAT GA 5% MT | 0.002649 | | | SPOKANE CNTY WA ARPT REVENUE | 0.002646 | | | BLACK BELT ENERGY GAS VAR | 0.002623 | | | CHICAGO ILLIN 6% 4/1/2046 | 0.002603 | ✓ | | California (State of) Housing Finance Agency (Social Certificates), Series 2023-1, RB | 0.002590 | | | Fishers Town Hall Building Corp., Series 2023 A, RB | 0.002510 | | | MASSACHUSETTS ST DEV FIN AGY R REGD B/E 5.00000000 | 0.002490 | | | Maryland Department of Housing & Community Development, Series 2024 E | 0.002485 | | | WISCONSIN ST HT 4% 4/1/2040 | 0.002434 | | | New Hampshire Business Finance Authority, Series 2024A | 0.002423 | | | PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.00000000 | 0.002413 | | | Public Energy Authority of Kentucky, Gas Supply Revenue Bonds, Series 2025B | 0.002387 | | | COLORADO ST HLTH FACS AUTH REV REGD B/E 4.00000000 | 0.002357 | | | ORANGE HLTH FACS-A | 0.002301 | | | Jefferson (County of), AL, Series 2024, Ref. Revenue Wts. | 0.002283 | ✓ | | SAN ANTONIO WTR 5.25% 5/15/2052 | 0.002254 | | | Travis County Healthcare District | 0.002242 | ✓ | | Energy Southeast A Cooperative District, Series B-1 | 0.002233 | ✓ | | MICHIGAN ST HSG DEV AUTH RENTAL HSG REVENUE | 0.002232 | | | FRETE ML-15 TRUST | 0.002228 | | | California Community Choice Financing Authority, Series C | 0.002227 | | | NY NYCDEV 5 11/15/2044 | 0.002213 | ✓ | ## Tax-Exempt High Yield Bond Fund — top positions | Security | Weight | Shared | |----------|--------|--------| | U.S. Cash Management Fund | 0.022721 | | | OH BUCGEN 5 06/01/2055 | 0.011235 | ✓ | | PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 | 0.009425 | ✓ | | PUERTO RICO SALES TAX FING COR REGD OID B/E 5.00000000 | 0.009146 | ✓ | | WI PUBTRN 6.5 12/31/2065 | 0.005632 | | | New York State Dormitory Authority | 0.005206 | | | Puerto Rico Commonwealth Aqueduct & Sewer Authority, Series A | 0.004997 | | | NY NYCDEV 5 11/15/2044 | 0.004638 | ✓ | | Salt River Project Agricultural Improvement & Power District, Series 2025, RB | 0.004476 | | | San Francisco City & County Airport Comm-San Francisco International Airport, Series 2025D | 0.004451 | | | NEW YORK ST THRUWAY AUTH PERSONAL INCOME TAX REVENUE | 0.004126 | | | NY TRANS CORP 5.50% 6/30/2054 @ | 0.004044 | | | RESTRUCTURED-SER A-2 | 0.004019 | ✓ | | TUSCLSA AL GOZ 5.25% 5/1/2044 | 0.004011 | | | Puerto Rico, GDB Debt Recovery Authority Commonwealth Bonds, Taxable Series 2018 | 0.004008 | | | RESTRUCTURED-SER A1 | 0.003644 | ✓ | | PENNSYLVANIA ST ECON DEV FING REGD B/E AMT 5.75000000 | 0.003642 | | | Puerto Rico, General Obligation Bonds, Vintage CW NT Claims Taxable Series 2022 | 0.003507 | ✓ | | City of Orlando, Series 2026B | 0.003504 | | | TX TRANSPRTN FIN-A | 0.003486 | | | City of New York, Series 2026G | 0.003459 | | | Harris County, Texas, Toll Road Revenue Bonds, Refunding First Lien Series 2024A | 0.003456 | | | Weatherford College of the Parker County Junior College District, Series 2025, RB | 0.003422 | | | UNITED STATES VIRGIN ISLANDS FEDERAL EXCISE TAX 5.0% 10-01-30 | 0.003390 | | | AR ARSDEV 09/01/2046 | 0.003371 | | | MISSOURI ST HLTH & EDUCTNL FACS AUTH | 0.003294 | | | STATE OF NEW JERSEY 4.0% 06-15-45 | 0.003139 | ✓ | | CHICAGO IL BRD OF EDU REGD OID B/E 5.75000000 | 0.002855 | | | NEW HOPE EDU FACS-A-1 | 0.002847 | | | CA STWD 5% 12/1/2046 | 0.002792 | | | NY TRANS CORP 5.375% 6/30/2060 @ | 0.002764 | | | RESTRUCTURED-SER A-2 | 0.002739 | ✓ | | San Francisco (City & County of), CA Airport Commission (San Francisco International Airport), Series 2019 A, RB | 0.002707 | | | George L. Smith II GA World Congress Center Auth. Rev. (Convention Center Hotel) A | 0.002650 | | | SOUTH JERSEY PORT NJ 17B AMT SF 5.0% 01-01-42 | 0.002623 | | | Jefferson (County of), AL, Series 2024, Ref. RB | 0.002598 | | | Toll Road Sr Lien Refunding RB Series 2021A | 0.002579 | | | MWAA DULLES TOL 4% 10/1/2049 | 0.002497 | | | NH NFAUTL 6.89 04/01/2034 | 0.002418 | | | PROJECTNEW YORK TRANS | 0.002357 | | | STATE OF ILLINOIS MCCORMICK PLACE EXPANSION PROJECT FUND 4.0% 06-15-52 | 0.002298 | ✓ | | PUERTO RICO SALES TAX FING COR REGD OID B/E 4.75000000 | 0.002280 | ✓ | | BALTIMORE MD WASTEWATER SUB 14C SF 5.0% 07-01-44 | 0.002265 | | | PROMEDICA HEALTHCARE OBLIGATED GROUP 5.25% 11-15-48 | 0.002256 | | | NJ TRANSPRTN TRUST-CC | 0.002185 | | | LONGWOOD HOUSING FOUNDATION LLC 5.0% 01-01-40 | 0.002180 | | | Black Belt Energy Gas District | 0.002161 | ✓ | | Travis County Healthcare District | 0.002157 | ✓ | | IL CHITRN 5.25 01/01/2061 | 0.002134 | | | PUERTO RICO SALES TAX FING COR REGD ZCP OID B/E 0.00000000 | 0.002131 | | ## Sources - N-PORT (fund A) — accession `0002071691-26-011438` (as of 2026-03-31) - N-PORT (fund B) — accession `0001410368-26-063588` (as of 2026-04-30) --- _Informational only — not investment advice. FundWatcher presents publicly available data and makes no recommendation to buy or sell any security. Verify all figures against the source filing before relying on them._ _Data sourced from U.S. SEC EDGAR filings (Forms N-PORT, N-CEN, and prospectus Risk/Return summaries). FundWatcher is not affiliated with the SEC._ _Use of this data is subject to the FundWatcher Terms of Service. Information may be used only for personal, non-commercial research and may not be redistributed. See _