Back to top
more

Mfs Municipal Income Fund Class B: (MF: MMIBX)

(NASDAQ Mutual Funds) As of Aug 25, 2026 05:58 PM ET

$8.09 USD

+0.01 (0.12%)

Zacks MF Rank

This is our Mutual Fund rating system that serves as a timeliness indicator for Mutual Fund's over the next 6 months:

Zacks Rank Definition
1 Strong Buy
2 Buy
3 Hold
4 Sell
5 Strong Sell

Zacks Mutual Fund Rank FAQ - Learn more about the Zacks Mutual Fund Rank
Zacks Mutual Fund Rank Home - All Zacks Rank resources in one place
Zacks Premium - The only way to get access to the Zacks Rank

1-Strong Buy of 5 1        

View All Zacks Mutual Fund Rank #1's

Zacks Premium Research for MMIBX

Zacks MF Rank

This is our Mutual Fund rating system that serves as a timeliness indicator for Mutual Fund's over the next 6 months:

Zacks Rank Definition
1 Strong Buy
2 Buy
3 Hold
4 Sell
5 Strong Sell

Zacks Mutual Fund Rank FAQ - Learn more about the Zacks Mutual Fund Rank
Zacks Mutual Fund Rank Home - All Zacks Rank resources in one place
Zacks Premium - The only way to get access to the Zacks Rank

Strong Buy 1
MF Report

Fund Description

The fund normally invests primarily in municipal instruments, including general obligation bonds, project or revenue-specific bonds, municipal lease obligations, and pre-refunded or escrowed bonds. Under normal market conditions, at least 80% of net assets (including borrowings for investment purposes) are invested in securities and other investments whose interest is exempt from U.S. federal income tax, though interest may be subject to the federal alternative minimum tax. The fund focuses mainly on investment-grade debt but may also hold below investment-grade instruments, may concentrate 25% or more in similar project types, and may emphasize a single state or a small number of states. It may use derivatives for various purposes and is managed with active bottom-up fundamental analysis, supported by quantitative tools and top-down considerations.

Load Information

Ticker Max
Load %
Deferred
Load %
Red.
Fee %
12B-1
Fee %
Mgmt
Fee %
Expense
Ratio %
MFS Municipal Income B MMIBX NA 4.00 0.00 1.00 0.36 1.53

Return Data

Ticker Nav Inception Date % yield 1 year return 2 year return 3 year return
MFS Municipal Income Fund B MMIBX 8.09 12/29/1986 3.02 5.65 2.97 -0.40
MFS Municipal Income Fund A MFIAX 8.13 12/29/1986 3.76 6.43 3.74 0.33
MFS Municipal Income Fund C MMICX 8.16 12/29/1986 3.01 5.64 2.97 -0.39
MFS Municipal Income Fund A1 MMIDX 8.13 7/2/2007 4.02 6.70 3.96 0.58
MFS Municipal Income Fund B1 MMIGX 8.14 7/2/2007 3.26 5.90 3.18 -0.16
MFS Municipal Income Fund I MIMIX 8.12 8/1/2011 4.02 6.70 3.95 0.57

Investment Information

Ticker Minimum Initial Investment ($) Minimum Subsequent Investment ($) Minimum Initial IRA ($) Dividend Frequency
MFS Municipal Income B MMIBX CLOSED 99 99 M

Contact Information

Family MFS
Address 500 Boylston St
Boston, MA 02116
Phone 800 225-2606