MFS Municipal Income Fund Class A1 (MMIDX)

Fund Assets	7.07B
Expense Ratio	0.54%
Min. Investment	$1,000
Turnover	12.00%
Dividend (ttm)	0.33
Dividend Yield	4.04%
Dividend Growth	4.37%
Payout Frequency	Monthly
Ex-Dividend Date	Jul 31, 2026

Previous Close	8.08
YTD Return	0.98%
1-Year Return	6.31%
5-Year Return	3.32%
52-Week Low	7.89
52-Week High	8.30
Beta (5Y)	0.08
Holdings	2343
Inception Date	Jun 25, 2007

About MMIDX

MFS Municipal Income Fund Class A1 is a mutual fund that centers its investment strategy on generating tax-exempt income, primarily by investing in municipal bonds issued by U.S. state and local governments. Its objective is to deliver total return with a strong emphasis on income that is generally exempt from federal income tax, while also considering opportunities for capital appreciation. The fund maintains a diversified portfolio, with over 98% of assets in municipal securities, and minimal allocations to high yield and investment-grade corporate bonds. Managed by an experienced team leveraging a data-driven, risk-averse approach, it focuses on consistent long-term performance and robust risk management. The fund features a monthly dividend payout structure, making it relevant for investors prioritizing steady, tax-advantaged income streams. With net assets exceeding $5.8 billion as of mid-2025, MFS Municipal Income Fund Class A1 holds a significant place in the national long-term municipal bond category, supporting public infrastructure while serving as a key offering for investors seeking efficient exposure to the municipal fixed-income market.

• Fund Family: MFS
• Category: Muni National Long
• Performance Rating: High
• Risk Rating: Average
• Stock Exchange: NASDAQ
• Ticker Symbol: MMIDX
• Share Class: A1
• Index: Bloomberg Municipal Bond TR

Performance

MMIDX had a total return of 6.31% in the past year, including dividends. Since the fund's inception, the average annual return has been 3.59%.

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	0.50%
FUENX	Fidelity	Fidelity Flex Municipal Income Fund	n/a
FHIGX	Fidelity	Fidelity Municipal Income Fund	0.43%

Other Share Classes

These are alternative share classes of the same fund, from the same provider.

Symbol	Share Class	Expense Ratio
MPMNX	R6	0.47%
MIMIX	I	0.54%
MFIAX	A	0.79%
MMIGX	B1	1.29%

Dividend History

Ex-Dividend	Amount	Pay Date
Jul 31, 2026	$0.02791	Aug 3, 2026
Jun 30, 2026	$0.02706	Jul 1, 2026
May 29, 2026	$0.02791	Jun 1, 2026
Apr 30, 2026	$0.02693	May 1, 2026
Mar 31, 2026	$0.0276	Apr 1, 2026
Feb 27, 2026	$0.02523	Mar 2, 2026

Data Sources: Tiingo, Twelve Data, and more

Historical data is provided by Tiingo. Delayed stock pricing data is provided by Twelve Data. Several fund data points are also provided by Finnhub.

Last checked:

Aug 22, 2026

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