MFS Municipal Income Fund Class B (MMIBX)
| Fund Assets | 6.95B |
| Expense Ratio | 1.51% |
| Min. Investment | $1,000 |
| Turnover | 9.00% |
| Dividend (ttm) | 0.24 |
| Dividend Yield | 2.88% |
| Dividend Growth | 5.69% |
| Payout Frequency | Monthly |
| Ex-Dividend Date | Jan 30, 2026 |
| Previous Close | 8.25 |
| YTD Return | 1.11% |
| 1-Year Return | 4.00% |
| 5-Year Return | 0.14% |
| 52-Week Low | 7.58 |
| 52-Week High | 8.26 |
| Beta (5Y) | n/a |
| Holdings | 2252 |
| Inception Date | Dec 29, 1986 |
About MMIBX
MFS Municipal Income Fund Class B is a mutual fund that seeks to provide investors with a total return, emphasizing regular income that is exempt from federal income tax while also considering opportunities for capital appreciation. Primarily, the fund invests in a diverse portfolio of municipal bonds, which are debt securities issued by state and local governments or their agencies. While it focuses on investment-grade bonds, it can also allocate assets to below investment grade securities, aiming to capitalize on relative value opportunities within the municipal bond market. The fund is actively managed by an experienced team that utilizes both quantitative risk analysis and in-depth fundamental research, striving for consistent performance and careful risk management. With over 2,000 holdings and substantial assets under management, it plays a significant role for investors seeking federally tax-advantaged income streams. Dividends are distributed monthly, and the fund aligns its performance to the Bloomberg Municipal Bond Index, a widely followed benchmark representing the U.S. municipal bond market. Established in 1986, the fund’s long operational track record and broad diversification make it a major participant in the municipal fixed-income sector.
Performance
MMIBX had a total return of 4.00% in the past year, including dividends. Since the fund's inception, the average annual return has been 8.60%.
Equivalent Funds
These are funds that follow the same index from the other major fund companies.
| Symbol | Provider | Name | Expense Ratio |
|---|---|---|---|
| FLUVX | Fidelity | Fidelity Advisor Municipal Income Fund - Class M | 0.75% |
| FKISX | Fidelity | Fidelity Advisor Municipal Income Fund - Class C | 1.50% |
| FROGX | Fidelity | Fidelity Advisor Municipal Income Fund - Class I | 0.51% |
| FUENX | Fidelity | Fidelity Flex Municipal Income Fund | n/a |
| FHIGX | Fidelity | Fidelity Municipal Income Fund | 0.44% |
Dividend History
| Ex-Dividend | Amount | Pay Date |
|---|---|---|
| Jan 30, 2026 | $0.0208 | Feb 2, 2026 |
| Dec 31, 2025 | $0.02045 | Dec 31, 2025 |
| Nov 28, 2025 | $0.01951 | Dec 1, 2025 |
| Oct 31, 2025 | $0.02061 | Nov 3, 2025 |
| Sep 30, 2025 | $0.02036 | Oct 1, 2025 |
| Aug 29, 2025 | $0.0205 | Sep 2, 2025 |