MRBIX Mutual Fund

MRBIX Mutual Fund

NAV$9.27
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Fund Essentials - as of Aug 31, 2026

Net Assets
$1.7B
Expense Ratio
0.45%
Dividend Yield (Current)
3.90%
Holdings
1,089
Inception Date
Jan 4, 1999
Fund Family
MFS Investment Management
Investment Style
PRO
Asset Class
PRO
Legal Structure
PRO
Dividend Frequency
Monthly
SEC 30-Day Yield
PRO

Performance

YTD-0.51%
1 Year-0.21%
3 Year+5.95%
5 Year+0.17%
10 Year+1.97%

Asset Allocation

Bonds: 85.48%
Cash: 1.61%
Other: 12.91%
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Top Holdings

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TickerNameWeight
-5 Year Treasury Note Future Dec 264.78%
-2 Year Treasury Note Future Dec 264.38%
-Ultra Us Treasury Bond Future Dec 262.05%
T 4.75 11/15/43Us Treas Bds 4.75% 11/15/431.84%
T 4.25 06/30/29United States Treasuryu.S. Treasury Notes1.80%
Top 10 Concentration: 21.82%Report Date: Aug 31, 2026
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Dividend Summary

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Dividend Yield (Current)
3.90%
Frequency
Monthly
Latest Distribution
$0.02
-

Peer Comparison

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

MRBIX Mutual Fund Overview

MRBIX Mutual Fund (MFS Total Return Bond Fund Class I) is managed by MFS Investment Management with $1.75B in net assets. MRBIX expense ratio is 0.45%, holding 1089 positions across sectors including Financials, Energy, Industrials. Inception date: 1999-01-04.

MRBIX performance shows a YTD return of -0.51%. The 1-year return is -0.21% and the 5-year return is 0.17%. MRBIX dividend yield stands at 3.90%, paid monthly.

MRBIX top holdings include 5 Year Treasury Note Future Dec 26 (4.8%), 2 Year Treasury Note Future Dec 26 (4.4%), Ultra Us Treasury Bond Future Dec 26 (2.0%), Us Treas Bds 4.75% 11/15/43 (1.8%), United States Treasuryu.S. Treasury Notes (1.8%). Go to all MRBIX holdings, MRBIX sectors, or MRBIX dividends.

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