MFS Active Core Plus Bond ETF

MFSB
ETF Ticker

-1.11%

-0.84%

NYSE Arca Exchange

Fixed Income

United States

Aggregate

The MFS Active Core Plus Bond ETF, MFSB_US, is an actively managed strategy providing exposure to United States, Aggregate Fixed Income. It is listed on the NYSE Arca Exchange and has assets under management of $550.0m (as of Aug 31, 2026). The ETF trades in USD and was listed on the exchange on Dec 5, 2024. It has a net expense ratio of 34bps. (All data in USD as of Oct 15, 2026 unless stated.)

The investment strategy steering the actively managed MFS Active Core Plus Bond ETF seeks total return with emphasis on income by investing primarily in investment-grade USD fixed income while tactically extending into “plus” sectors to enhance carry and alpha. Asset selection integrates top-down macro views, bottom-up research, and technical inputs within an explicit risk-budgeting framework that guides sector, quality, and curve positioning. Under normal conditions the fund invests at least 80% of assets in debt instruments, with flexibility to allocate to securitized credit (agency/non-agency), corporate credit, U.S. Treasuries/agencies, high yield, and emerging-markets debt as opportunity warrants. Portfolio construction balances issuer/sector diversification with conviction sizing; duration and yield-curve stances are actively managed. Derivatives (e.g., futures, interest-rate swaps, currency/credit derivatives) may be used for hedging or efficient exposure. Active trading, liquidity management, and collateral practices support execution and capacity.

ETF Details

Key Facts

Issuer:
MFS
AUM:
$550.0m (as of Aug 31, 2026)
Net Expense Ratio:
34 bps
Inception Date:
Dec 5, 2024
Index:
Actively managed strategy
Dividend Frequency:
Monthly

Trading

Ticker:
MFSB
Exchange:
NYSE Arca Exchange
ISIN:
US55286W1080
Trading Currency:
USD
Domicile:
United States

Classification & Risk

Asset Class:
Fixed Income
Asset Region:
United States
Theme:
Aggregate
Economic Development:
Developed Markets
1 Year Volatility:
3.83%
3 Year Volatility:
N/A
5 Year Volatility:
N/A

Performance

TTM Dividend Yield:
4.49% (verify with issuer)
1 Month Performance:
-0.58%
3 Month Performance:
-1.70%
6 Month Performance:
-1.91%
1 Year Performance:
-0.84%
3 Year Performance:
N/A
5 Year Performance:
N/A
Investment Proposition

MFS Active Core Plus Bond ETF (MFSB) delivers an actively managed, core-plus U.S. bond approach seeking total return with an emphasis on income by combining broad core fixed-income exposure with selective plus-sector opportunities. The team applies a collaborative process that integrates macro views, fundamental credit research and technical insights to set a risk budget and allocate across government, securitized and corporate markets, with flexibility to add off-benchmark credit where compensated. Security selection and sector/quality allocation are intended primary return drivers, while duration and curve are managed as complementary levers. The strategy’s profile generally reflects intermediate interest-rate sensitivity and a measured credit bias, making it responsive to cyclical changes in growth, inflation and liquidity conditions. Portfolio roles include a core taxable bond anchor, a credit-tilted income sleeve, and a ballast for multi-asset allocations seeking diversification versus equities. Appropriate for liability-aware allocators prioritizing consistent income and diversified credit exposure, and for multi-manager platforms pursuing active core-plus alpha over a cycle. Key risk to monitor: the incremental credit and structural complexity of plus sectors, which can increase drawdown potential if spreads reprice abruptly.

ETF Analytics

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