# MFSB (MFS Active Core Plus Bond ETF)

MFS · Bond ETFs · Corporate bond · data as of Oct 2, 2026

MFSB is actively managed and returned −1.6% over the past year.

## Key facts

- MFSB, total return, 1 year: −1.6%, as of Oct 2, 2026.
- MFSB, expense ratio: 0.34%, as of Oct 2, 2026.
- MFSB, holdings: 407, as of Oct 2, 2026.
- MFSB, below its high: −4.0%, as of Oct 2, 2026.
- MFSB, net assets: $424m (SEC filing, whole fund, as filed for May 31, 2026).

## MFSB over each window to Oct 2, 2026

| Window | Total return | S&P 500 | Gap to S&P 500 | Gap to Nasdaq-100 |
| --- | --- | --- | --- | --- |
| 3 months | −3.3% | +3.6% | −6.9 pts | −8.6 pts |
| 6 months | −2.4% | +17.9% | −20.4 pts | −30.9 pts |
| 1 year | −1.6% | +16.2% | −17.8 pts | −25.9 pts |
| Since listing | +3.4% | +29.8% | −26.3 pts | −41.6 pts |

## Every published field

| Field | Value | Source |
| --- | --- | --- |
| What it tracks | No index, actively managed | ETFIQ |
| Fund type | Bond fund | ETFIQ |
| Category | Bonds · Corporate bond | ETFIQ |
| Expense ratio | 0.34% | 485BPOS XBRL, Jun 25, 2026 |
| Price | $23.81 | ETFIQ |
| Listed since | Dec 5, 2024 | ETFIQ |
| Net assets | $424m | SEC filing, whole fund, as filed for May 31, 2026 |
| Below its high | −4.0% | ETFIQ |
| Holdings | 407 | ETFIQ |
| Top ten weight | 24.3% | ETFIQ |
| Holdings as of | May 31, 2026 | SEC N-PORT |

## Questions

### How has MFSB performed?

Over the year to Oct 2, 2026, MFSB returned −1.6% with distributions reinvested, against +16.2% for the S&P 500. Over three years the figure is not published.

### What does MFSB cost?

The prospectus expense ratio is 0.34% a year.

### How far is MFSB below its high?

4.0% below its high of Feb 27, 2026, measured on the reinvested series to Oct 2, 2026.


## Cite this page

ETFIQ, MFSB, data as of Oct 2, 2026. https://etfiq.com/funds/mfsb
Free to use with attribution; the underlying files are at https://etfiq.com/data/.

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