Morningstar

MFS Municipal High Income Fund Class B MMHBX

Morningstar Medalist Rating
Medalist Rating as of | See MFS Investment Hub
  • NAV / 1-Day Return 7.01  /  +0.43 %
  • Total Assets 5.2B
  • Adj. Expense Ratio
    1.410%
  • Expense Ratio 1.410%
  • Distribution Fee Level Low
  • Share Class Type Deferred Load
  • Category High Yield Muni
  • Credit Quality / Interest Rate Sensitivity —
  • Min. Initial Investment 1,000
  • Status Closed
  • TTM Yield 3.61%
  • 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 MMHBX

Will MMHBX 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 MMHBX’s performance objective and investment process is for both security selection and portfolio construction.

  • People Pillar

    The People Pillar is our evaluation of the MMHBX 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 MMHBX’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

Unlock our full analysis with Morningstar Investor

Portfolio Holdings MMHBX

More MMHBX 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

Sponsor Center