Morningstar

MFS Municipal High Income Fund Class R6 MMHKX

Morningstar Medalist Rating
Medalist Rating as of | See MFS Investment Hub
  • NAV / 1-Day Return 6.99  /  +0.43 %
  • Total Assets 5.2B
  • Adj. Expense Ratio
    0.570%
  • Expense Ratio 0.570%
  • Distribution Fee Level High
  • Share Class Type Retirement, Large
  • Category High Yield Muni
  • Credit Quality / Interest Rate Sensitivity —
  • Min. Initial Investment 0
  • Status Open
  • TTM Yield 4.41%
  • Effective Duration 8.04 years

USD | NAV as of Oct 02, 2026 | 1-Day Return as of Oct 02, 2026, 1:34 AM GMT+0

Morningstar’s Analysis MMHKX

Will MMHKX outperform in the future?

Get our overall rating based on a fundamental assessment of the pillars below.

  • Process Pillar

    The Process Pillar is our assessment of how sensible, clearly defined, and repeatable MMHKX’s performance objective and investment process is for both security selection and portfolio construction.

  • People Pillar

    The People Pillar is our evaluation of the MMHKX management team’s experience and ability. We find that high-quality management teams deliver superior performance relative to their benchmarks and/or peers.

  • Parent Pillar

    The Parent Pillar is our rating of MMHKX’s parent organization’s priorities and whether they’re in line with investors’ interests.

A solid high-yield muni pick.

Associate Director Tom Murphy

Tom Murphy

Associate Director

Summary

MFS Municipal High Income’s experienced team follows a relative value framework that has delivered for investors over the long haul.

by Tom Murphy
Rated on Published on

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Portfolio Holdings MMHKX

More MMHKX Holdings
  • Current Portfolio Date
  • Equity Holdings —
  • Bond Holdings —
  • Other Holdings —
  • % Assets in Top 10 Holdings 6.0
Top 10 Holdings
% Portfolio Weight
Market Value USD
Sector

PUERTO RICO SALES TAX FING CORP SALES TAX REV 5%

1.80 101M
municipal

Currency Cash CASH_USD

1.77 99M
Cash and Equivalents

BERKS CNTY PA MUN AUTH REV 5%

0.58 32M
municipal

BUCKEYE OHIO TOB SETTLEMENT FING AUTH 5%

0.55 30M
municipal

BLACK BELT ENERGY GAS DIST ALA GAS PROJ REV 5.25%

0.50 28M
municipal

CALIFORNIA CMNTY CHOICE FING AUTH CLEAN ENERGY PROJ REV 5.25%

0.49 27M
municipal

NEW YORK TRANSN DEV CORP SPL FAC REV 5.13%

0.44 24M
municipal

NATIONAL FIN AUTH N H LEASE RENT REV 5.88%

0.43 24M
municipal

NEW YORK TRANSN DEV CORP SPL FAC REV 5.25%

0.42 24M
municipal

PUBLIC FIN AUTH WIS HOSP REV 5.5%

0.41 23M
municipal

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