Morningstar

American Century High-Yield Municipal Fund Y Class AYMYX

Morningstar Medalist Rating
Medalist Rating as of | See American Century Investment Hub
  • NAV / 1-Day Return 8.73  /  −0.11 %
  • Total Assets 574.5M
  • Adj. Expense Ratio
    0.370%
  • Expense Ratio 0.360%
  • Distribution Fee Level Low
  • Share Class Type Institutional
  • Category High Yield Muni
  • Credit Quality / Interest Rate Sensitivity —
  • Min. Initial Investment 0
  • Status Open
  • TTM Yield 4.52%
  • Effective Duration 7.89 years

USD | NAV as of Jul 22, 2026 | 1-Day Return as of Jul 22, 2026, 12:11 AM GMT+0

Morningstar’s Analysis AYMYX

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

  • People Pillar

    The People Pillar is our evaluation of the AYMYX 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 AYMYX’s parent organization’s priorities and whether they’re in line with investors’ interests.

Too peer-conscious to stand out.

Associate Analyst River Meng

River Meng

Associate Analyst

Summary

American Century High Yield Muni’s tendency to avoid outsize peer-relative bets results in a middle-of-the-road high-yield municipal-bond offering.

by River Meng
Rated on Published on

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Portfolio Holdings AYMYX

More AYMYX Holdings
  • Current Portfolio Date
  • Equity Holdings —
  • Bond Holdings —
  • Other Holdings —
  • % Assets in Top 10 Holdings 8.8
Top 10 Holdings
% Portfolio Weight
Market Value USD
Sector

BUCKEYE OHIO TOB SETTLEMENT FING AUTH 5%

1.09 6M
municipal

BUILD NYC RESOURCE CORP N Y REV 5.5%

1.04 6M
municipal

CENTRAL PLAINS ENERGY PROJ NEB GAS PROJ REV 5%

0.91 5M
municipal

NEW JERSEY ST TRANSN TR FD AUTH 5%

0.89 5M
municipal

PUBLIC FIN AUTH WIS REV 5.25%

0.89 5M
municipal

NEW JERSEY ECONOMIC DEV AUTH SPL FAC REV 5%

0.87 5M
municipal

ST LOUIS CNTY MO INDL DEV AUTH SR LIVING FACS REV 5.25%

0.87 5M
municipal

ESCAMBIA CNTY FLA HEALTH FACS AUTH HEALTH FAC REV 4%

0.77 4M
municipal

NEW YORK N Y 5%

0.72 4M
municipal

HASTINGS CAMPUS HSG FIN AUTH CALIF CAMPUS HSG REV 6.75%

0.69 4M
municipal

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