What If You Could Take Your Fixed Income Further?
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Assess Managers
Are You Invested With Too Few Fixed Income Managers?
Typically, investors are 70% less diversified in their fixed income manager allocation than in their equity manager allocation.


Source: Broadridge, 2/28/25; Morningstar categories map into four broad asset classes (US Stock, International Stock, Taxable Bond and Municipal Bond).
Key TakeawayAllocating to fewer managers may increase the possibility of investing in similarly managed funds that will perform similarly – and expose portfolios to fewer opportunities in changing markets.
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Consider Performance Drivers
Are Your Fixed Income Managers Primarily Duration - Focused?
Duration-focused managers make decisions based on correctly forecasting interest rate changes, which narrows outcomes to two possibilities—getting it right or not.
Predicting interest rates is not easy, yet many managers rely heavily on duration to generate returns, potentially leading to lost opportunities.
How About Credit-Focused Managers?
Credit-focused managers make decisions based on fundamental research across sectors, securities and quality.
Key TakeawayRelying on a broad range of factors to generate returns can help managers pursue more consistent through-cycle alpha.
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Diversify Alpha
Credit And Duration: Ready To Take Advantage Of Both?
Using a hypothetical 50/50 allocation to duration and credit managers has paid off
Excess Return Over the Bloomberg US Aggregate Index 12/31/2014–12/31/2024
Source: Morningstar as of 12/31/2024. Includes the ten largest managers in the core plus category based on AUM. Four credit managers that use the credit alpha lever are shown in the credit category and six managers that exhibited the greatest range of duration positioning and showed persistent duration bias over the last five years are shown for the duration category. The duration and credit blend equally weights the ten funds for a total of 100%. Hypothetical credit and duration portfolios gross cumulative returns benchmarked against the Bloomberg US Agg Bond TR USD. The portfolio-level performance returns shown are hypothetical, based on historic economic and market assumptions.This data is not intended to represent the performance of any MFS fund and no MFS funds are included in the hypothetical portfolios.
Hypothetical performance is for illustrative purposes only and is not a guarantee of future results. The information presented is based upon hypothetical assumptions. Certain assumptions have been made for modeling purposes and are unlikely to be realized. No representation or warranty is made as to the reasonableness of the assumptions made or that all assumptions used in calculating returns have been stated or fully considered. Hypothetical performance is developed with the benefit of hindsight (i.e., actual knowledge of market conditions, results of similar strategies) and thus has many inherent limitations. Actual performance returns will vary.Past performance is no guarantee of future results.Key TakeawayIn complex and changing bond markets, adding or investing in another performance driver such as credit offers the potential for more consistent alpha generation.
Take Your Fixed Income Further
ASSESS
fixed income managers
CONSIDER
performance drivers
DIVERSIFY
alpha
EXPLORE
credit- and duration-focused fundsMFS Core Plus Funds
Past performance is no guarantee of future results.
Key TakeawayRelying on our deep fundamental research and global investment platform, MFS leverages primarily credit and to a lesser degree duration to generate returns through changing market dynamics.
Keep in mind that all investments, including mutual funds, carry a certain amount of risk including the possible loss of the principal amount invested.
A prospectus for any of the MFS products is available by mail or download. The prospectus should be read carefully as it contains complete information on the fund's investment objective(s), the risks associated with an investment in the fund, the fees, charges, and expenses involved, as well as other information about the fund. These elements, as well as other information contained in the prospectus, should be considered before investing. These products are available for sale only within the United States.
Are You Invested With Too Few Fixed Income Managers?
Typically, investors are 70% less diversified in their fixed income manager allocation than in their equity manager allocation.


Source: Broadridge, 2/28/25; Morningstar categories map into four broad asset classes (US Stock, International Stock, Taxable Bond and Municipal Bond).
Allocating to fewer managers may increase the possibility of investing in similarly managed funds that will perform similarly – and expose portfolios to fewer opportunities in changing markets.
Are Your Fixed Income Managers Primarily Duration - Focused?
Duration-focused managers make decisions based on correctly forecasting interest rate changes, which narrows outcomes to two possibilities—getting it right or not.
Predicting interest rates is not easy, yet many managers rely heavily on duration to generate returns, potentially leading to lost opportunities.
How About Credit-Focused Managers?
Credit-focused managers make decisions based on fundamental research across sectors, securities and quality.
Relying on a broad range of factors to generate returns can help managers pursue more consistent through-cycle alpha.
Credit And Duration: Ready To Take Advantage Of Both?
Using a hypothetical 50/50 allocation to duration and credit managers has paid off
Excess Return Over the Bloomberg US Aggregate Index 12/31/2014–12/31/2024
Hypothetical performance is for illustrative purposes only and is not a guarantee of future results. The information presented is based upon hypothetical assumptions. Certain assumptions have been made for modeling purposes and are unlikely to be realized. No representation or warranty is made as to the reasonableness of the assumptions made or that all assumptions used in calculating returns have been stated or fully considered. Hypothetical performance is developed with the benefit of hindsight (i.e., actual knowledge of market conditions, results of similar strategies) and thus has many inherent limitations. Actual performance returns will vary.
In complex and changing bond markets, adding or investing in another performance driver such as credit offers the potential for more consistent alpha generation.
Take Your Fixed Income Further
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MFS Core Plus Funds
Past performance is no guarantee of future results.
Relying on our deep fundamental research and global investment platform, MFS leverages primarily credit and to a lesser degree duration to generate returns through changing market dynamics.
Keep in mind that all investments, including mutual funds, carry a certain amount of risk including the possible loss of the principal amount invested.
A prospectus for any of the MFS products is available by mail or download. The prospectus should be read carefully as it contains complete information on the fund's investment objective(s), the risks associated with an investment in the fund, the fees, charges, and expenses involved, as well as other information about the fund. These elements, as well as other information contained in the prospectus, should be considered before investing. These products are available for sale only within the United States.