MFS Municipal Income Fund Class I (MIMIX)

Fund Assets	7.10B
Expense Ratio	0.54%
Min. Investment	$1,000
Turnover	12.00%
Dividend (ttm)	0.33
Dividend Yield	4.16%
Dividend Growth	4.41%
Payout Frequency	Monthly
Ex-Dividend Date	Aug 31, 2026

Previous Close	7.84
YTD Return	-1.57%
1-Year Return	0.23%
5-Year Return	0.72%
52-Week Low	7.83
52-Week High	8.29
Beta (5Y)	0.08
Holdings	2357
Inception Date	Aug 1, 2011

About MIMIX

MFS Municipal Income Fund Class I is a mutual fund specializing in municipal bonds, with a primary goal of generating total return while emphasizing income that is exempt from federal income tax. The fund typically allocates at least 80% of its net assets to municipal securities, which can include bonds supporting key public projects in sectors like education, healthcare, housing, utilities, water, and infrastructure. With a diverse portfolio of over 2,000 holdings and net assets exceeding $5.8 billion as of mid-2025, it aims for consistent long-term performance using a risk-aware, research-driven investment process led by a seasoned management team. The fund’s strategy provides investors with a tax-advantaged income stream, making it significant for those seeking municipal bond exposure and tax efficiency in their fixed-income allocations. It distributes income monthly and is guided by the Bloomberg Municipal Bond Index as its benchmark, supporting both individual and institutional investors in achieving stable income and potential capital appreciation within the broader municipal bond market.

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

Performance

MIMIX had a total return of 0.23% in the past year, including dividends. Since the fund's inception, the average annual return has been 3.17%.

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 M	0.75%
FKISX	Fidelity	Fidelity Advisor Municipal Income C	1.50%
FROGX	Fidelity	Fidelity Advisor Municipal Income 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%
MMIDX	A1	0.54%
MFIAX	A	0.79%
MMIGX	B1	1.29%

Dividend History

Ex-Dividend	Amount	Pay Date
Aug 31, 2026	$0.02832	Sep 1, 2026
Jul 31, 2026	$0.02784	Aug 3, 2026
Jun 30, 2026	$0.027	Jul 1, 2026
May 29, 2026	$0.02784	Jun 1, 2026
Apr 30, 2026	$0.02686	May 1, 2026
Mar 31, 2026	$0.02753	Apr 1, 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:

Sep 18, 2026

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