MRBKX Mutual Fund

MRBKX Mutual Fund

NAV$9.14
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Fund Essentials - as of May 31, 2026

Net Assets
$4.0B
Expense Ratio
0.36%
Dividend Yield (Current)
3.94%
Holdings
1,075
Inception Date
May 1, 2006
Fund Family
MFS Investment Management
Investment Style
PRO
Asset Class
PRO
Legal Structure
PRO
Dividend Frequency
Monthly
SEC 30-Day Yield
PRO

Performance

YTD-0.23%
1 Year+2.98%
3 Year+4.45%
5 Year+0.14%
10 Year+1.98%

Asset Allocation

Bonds: 98.66%
Cash: 1.10%
Other: 0.24%
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Top Holdings

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TickerNameWeight
-Ust Bond 2Yr Future Sep 30 265.59%
-Ust Bond 5Yr Future Sep 30 265.47%
-Ust Ultra Bond Future Sep 21 262.41%
-Us Treasury Bond 4.75% Nov 15 432.12%
-Us Treasury Note 4.25% Jun 30 292.07%
Top 10 Concentration: 24.53%Report Date: May 31, 2026
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Dividend Summary

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Dividend Yield (Current)
3.94%
Frequency
Monthly
Latest Distribution
$0.02
-

Peer Comparison

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

MRBKX Mutual Fund Overview

MRBKX Mutual Fund (MFS Total Return Bond Fund Class R6) is managed by MFS Investment Management with $4.00B in net assets. MRBKX expense ratio is 0.36%, holding 1075 positions across various sectors. Inception date: 2006-05-01.

MRBKX performance shows a YTD return of -0.23%. The 1-year return is 2.98% and the 5-year return is 0.14%. MRBKX dividend yield stands at 3.94%, paid monthly.

MRBKX top holdings include Ust Bond 2Yr Future Sep 30 26 (5.6%), Ust Bond 5Yr Future Sep 30 26 (5.5%), Ust Ultra Bond Future Sep 21 26 (2.4%), Us Treasury Bond 4.75% Nov 15 43 (2.1%), Us Treasury Note 4.25% Jun 30 29 (2.1%). Go to all MRBKX holdings, MRBKX sectors, or MRBKX dividends.

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