MFS Income Fund Class B (MIOBX)

Fund Assets	8.06B
Expense Ratio	1.48%
Min. Investment	$1,000
Turnover	26.00%
Dividend (ttm)	0.23
Dividend Yield	4.17%
Dividend Growth	-3.11%
Payout Frequency	Monthly
Ex-Dividend Date	Sep 30, 2026

Previous Close	5.62
YTD Return	-2.63%
1-Year Return	-2.04%
5-Year Return	-4.76%
52-Week Low	5.59
52-Week High	6.02
Beta (5Y)	0.20
Holdings	539
Inception Date	Sep 7, 1993

About MIOBX

MFS Income Fund Class B Shares is a mutual fund designed to provide investors with a total return that places a strong emphasis on generating high current income, while also considering capital appreciation. The fund takes a diversified, flexible approach to fixed income investing, allocating assets across a broad spectrum of bond markets globally. Its portfolio includes a mix of high-grade and high-yield corporate bonds, U.S. government securities, mortgage-backed and asset-backed securities, as well as international and emerging market debt instruments. By strategically blending these varied fixed income sectors, the fund seeks to manage risk and capture income opportunities in different market environments. MFS Income Fund Class B Shares is positioned within the intermediate core-plus bond category and benchmarks its performance against the Bloomberg U.S. Aggregate Bond Index. It typically attracts investors looking for monthly income distributions through dividend payments and long-term participation in the bond market. The fund’s approach reflects a balance between generating steady income and providing potential for gradual capital growth, anchored by a broadly diversified and actively managed portfolio.

• Fund Family: MFS
• Category: Intermediate Core-Plus Bond
• Performance Rating: Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MIOBX
• Share Class: B
• Index: Bloomberg U.S. Aggregate Bond TR

Performance

MIOBX had a total return of -2.04% in the past year, including dividends. Since the fund's inception, the average annual return has been 3.84%.

Other Share Classes

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

Symbol	Share Class	Expense Ratio
MFIWX	R6	0.40%
MFIIX	I	0.48%
MFIOX	A	0.73%
MIOCX	C	1.48%

Dividend History

Ex-Dividend	Amount	Pay Date
Sep 30, 2026	$0.0212	Oct 1, 2026
Aug 31, 2026	$0.01919	Sep 1, 2026
Jul 31, 2026	$0.01917	Aug 3, 2026
Jun 30, 2026	$0.02017	Jul 1, 2026
May 29, 2026	$0.02014	Jun 1, 2026
Apr 30, 2026	$0.02012	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 10, 2026

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