MFS Core Bond R4 (MCBKX)

Fund Assets	33.47M
Expense Ratio	0.407%
Min. Investment	$0.00
Turnover	110.00%
Dividend (ttm)	0.44
Dividend Yield	4.72%
Dividend Growth	-6.00%
Payout Frequency	Monthly
Ex-Dividend Date	Sep 30, 2026

Previous Close	9.19
YTD Return	-1.51%
1-Year Return	-1.32%
5-Year Return	n/a
52-Week Low	9.11
52-Week High	9.85
Beta (5Y)	n/a
Holdings	309
Inception Date	Jun 22, 2022

About MCBKX

MFS Core Bond Fund R4 is an open-end mutual fund that primarily invests in investment-grade fixed income securities. Its central objective is to achieve a total return with a particular emphasis on generating current income, while also considering opportunities for capital appreciation. The fund allocates at least 80% of its assets to a diversified portfolio of high-quality bonds, including U.S. government securities, corporate bonds, and securitized instruments such as mortgage- or asset-backed securities. Employing an actively managed approach, the fund’s investment process integrates macroeconomic analysis with bottom-up security selection and technical market insights, aiming to manage risk and enhance value through strategic asset allocation, duration, and yield curve positioning. Portfolio managers collaborate closely with analysts to set risk budgets and identify appropriate investments, ensuring a comprehensive risk-management framework. Class R4 shares of this fund are typically available to eligible retirement plans and institutional investors. With a competitive net expense ratio, the fund seeks to balance income generation and principal stability, making it a core holding for investors requiring broad exposure to the U.S. investment-grade bond market. The fund’s performance is benchmarked against the Bloomberg U.S. Aggregate Bond Index, a widely recognized standard for the domestic fixed income market.

• Fund Family: MFS
• Category: Intermediate Core Bond
• Performance Rating: Above Average
• Risk Rating: Average
• Stock Exchange: Nasdaq
• Ticker Symbol: MCBKX
• Share Class: R4
• Index: Index is not provided by Management Company

Performance

MCBKX had a total return of -1.32% in the past year, including dividends. Since the fund's inception, the average annual return has been 3.13%.

Equivalent Funds

These are funds that follow the same index from the other major fund companies.

Symbol	Provider	Name	Expense Ratio
FIAKX	Fidelity	Fidelity Advisor Sust Core Plus Bond M	0.74%
FIGDX	Fidelity	Fidelity Series Sustainable Invmt GrdBd	n/a
FIAJX	Fidelity	Fidelity Advisor Sust Core Plus Bond C	1.49%
FIAMX	Fidelity	Fidelity Advisor Sust Core Plus Bond Z	0.36%
FIALX	Fidelity	Fidelity Advisor Sust Core Plus Bond I	0.45%

Other Share Classes

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

Symbol	Share Class	Expense Ratio
MCBMX	R6	0.33%
MCBFX	I	0.39%
MCBJX	R3	0.64%
MCBEX	A	0.64%

Dividend History

Ex-Dividend	Amount	Pay Date
Sep 30, 2026	$0.03719	Oct 1, 2026
Aug 31, 2026	$0.0372	Sep 1, 2026
Jul 31, 2026	$0.03509	Aug 3, 2026
Jun 30, 2026	$0.03493	Jul 1, 2026
May 29, 2026	$0.035	Jun 1, 2026
Apr 30, 2026	$0.03432	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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