MFS Municipal High Income R6 (MMHKX)

Fund Assets	5.17B
Expense Ratio	0.564%
Min. Investment	$1,000
Turnover	9.00%
Dividend (ttm)	0.34
Dividend Yield	4.81%
Dividend Growth	2.64%
Payout Frequency	Monthly
Ex-Dividend Date	Sep 30, 2026

Previous Close	6.99
YTD Return	-2.81%
1-Year Return	-1.44%
5-Year Return	-1.52%
52-Week Low	6.90
52-Week High	7.54
Beta (5Y)	0.11
Holdings	2156
Inception Date	Jun 2, 2017

About MMHKX

MFS Municipal High Income Fund Class R6 is a mutual fund designed to achieve total return, placing strong emphasis on providing high income that is exempt from federal income tax, while also seeking capital appreciation. The fund primarily invests at least 80% of its net assets in municipal bonds and related securities, focusing on high yield municipal debt instruments. Notably, these investments are structured to offer tax-advantaged income, making the fund particularly relevant for investors aiming to optimize after-tax returns. With a diversified portfolio of over 1,900 holdings, the fund maintains a heavy allocation to municipal securities—over 98% as of the latest reporting period—with a minor allocation to high yield corporate bonds and cash equivalents. MFS Municipal High Income Fund Class R6 is managed by an experienced team and utilizes a rigorous, risk-aware investment process underpinned by quantitative and qualitative research. Monthly income distributions are a hallmark, alongside a competitive net expense ratio of approximately 0.52%. The fund plays a significant role in the market by providing access to municipal bond markets for high-income-seeking institutional and retirement plan investors who desire tax-exempt income and broad sector diversification.

• Fund Family: MFS
• Category: High Yield Muni
• Performance Rating: Above Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MMHKX
• Share Class: R6
• Index: Bloomberg Municipal Bond TR

Performance

MMHKX had a total return of -1.44% in the past year, including dividends. Since the fund's inception, the average annual return has been 2.10%.

Other Share Classes

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

Symbol	Share Class	Expense Ratio
MMHKX	R6	0.57%
MMHYX	A	0.66%
MMIIX	I	0.66%
MMHBX	B	1.41%

Dividend History

Ex-Dividend	Amount	Pay Date
Sep 30, 2026	$0.02858	Oct 1, 2026
Aug 31, 2026	$0.02901	Sep 1, 2026
Jul 31, 2026	$0.02818	Aug 3, 2026
Jun 30, 2026	$0.02737	Jul 1, 2026
May 29, 2026	$0.02829	Jun 1, 2026
Apr 30, 2026	$0.02724	May 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:

Oct 16, 2026

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