MFBKX Mutual Fund

MFBKX Mutual Fund

NAV$11.98
See how much of MFBKX you already own
Just $25 once·$99/mo·Download sample
X-ray my portfolio free

Fund Essentials - as of Aug 31, 2026

Net Assets
$1.8B
Expense Ratio
0.41%
Dividend Yield (Current)
4.56%
Holdings
431
Inception Date
Jun 1, 2012
Fund Family
MFS Investment Management
Investment Style
PRO
Asset Class
PRO
Legal Structure
PRO
Dividend Frequency
Monthly
SEC 30-Day Yield
PRO

Performance

YTD-1.14%
1 Year-0.89%
3 Year+6.64%
5 Year+0.05%
10 Year+2.54%

Asset Allocation

Bonds: 101.20%
Cash: 2.84%
See how much of MFBKX you already own
Your funds unpacked, overlap, fees and score, free on screen. The full report comes with FundXLS. Download sample.
X-ray my portfolio free

Top Holdings

View All →
TickerNameWeight
-Mfs Institutional Money Market Portfolio1.66%
-Cash & Cash Equivalents1.38%
BA 5.805 05/01/50Boeing Co 5.805%, Due 05/01/20500.77%
-Jpmorgan Chase & Co Frb Nov 08 320.76%
UBS V3.126 08/13/30 Ubs Group Ag 3.126 08/13/20300.75%
Top 10 Concentration: 8.22%Report Date: Aug 31, 2026
Download all 431 holdings for MFBKX
CSV export with sector, industry & share changes
Get CSV

Dividend Summary

View Details →
Dividend Yield (Current)
4.56%
Frequency
Monthly
Latest Distribution
$0.03
-

Peer Comparison

Benchmark
PRO
Peer outperformance: PRO
Category rank: PRO
This Mutual Fund
PRO
Peer Avg
PRO

MFBKX Mutual Fund Overview

MFBKX Mutual Fund (MFS Corporate Bond Fund Class R6) is managed by MFS Investment Management with $1.80B in net assets. MFBKX expense ratio is 0.41%, holding 431 positions across sectors including Financials, Industrials, Consumer Discretionary. Inception date: 2012-06-01.

MFBKX performance shows a YTD return of -1.14%. The 1-year return is -0.89% and the 5-year return is 0.05%. MFBKX dividend yield stands at 4.56%, paid monthly.

MFBKX top holdings include Mfs Institutional Money Market Portfolio (1.7%), Cash & Cash Equivalents (1.4%), Boeing Co 5.805%, Due 05/01/2050 (0.8%), Jpmorgan Chase & Co Frb Nov 08 32 (0.8%), Ubs Group Ag 3.126 08/13/2030 (0.8%). Go to all MFBKX holdings, MFBKX sectors, or MFBKX dividends.

MFBKX can be compared against other funds. Use MFBKX overlap to find shared positions, or MFBKX vs another fund for a side-by-side view. MFBKX alternatives are available via the screener, along with tax-loss harvesting opportunities.