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MFSBvsBRTRETF Comparison

ETF 1
MFSB

MFS Active Core Plus Bond ETF

This fund is part of
US Aggregate Bonds
-0.02%
VS
ETF 2
BRTR

iShares Total Return Active ETF

This fund is part of
US Aggregate Bonds
-0.02%

MFS Active Core Plus Bond ETF (MFSB) and iShares Total Return Active ETF (BRTR) belong to the same industry segment: US Aggregate Bonds. MFSB's top 3 sector exposures are Sovereign, Finance and Industrials. In contrast, BRTR's top sector exposures are Sovereign, Industrials and Non-Corporate. MFSB is less expensive with a Total Expense Ratio (TER) of 0.34%, versus 0.41% for BRTR. MFSB is down -0.77% year-to-date (YTD) with +$432M in YTD flows. BRTR performs worse with -1.51% YTD performance, and +$288M in YTD flows. Run a side-by-side ETF comparison of MFSB and BRTR below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.

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MFSB vs BRTR performance and flow charts

Performance

-1.0-0.50.00.5%Aug 17Aug 24Aug 31Sep 7Sep 14

Cumulative Flows

0 M10 M20 M30 M40 MAug 17Aug 24Aug 31Sep 7Sep 14

Get all the metrics on this page, and more, through a reliable ETF data feed

Daily, global ETF data for advanced analysis or integration into apps (API), from our partner Trackinsight.

Historic performance and flows
Data as of 09/16/2026
1M3MYTD1Y3Y5Y
Perf.
MFSB
BRTR
-0.95%-1.33%
-1.91%-2.38%
-0.77%-1.51%
-0.12%-0.83%
n/an/a
n/an/a
Flows
MFSB
BRTR
+$45M+$34M
+$134M+$77M
+$432M+$288M
+$507M+$537M
--
--
Volatility and drawdown
3M1Y3Y5Y
Volatility
MFSB
BRTR
+3.44%+3.85%
+3.32%+3.77%
n/an/a
n/an/a
Max drawdown
MFSB
BRTR
-2.27%-2.72%
-2.57%-3.45%
n/an/a
n/an/a
Max drawdown duration
MFSB
BRTR
79d79d
199d199d
n/an/a
n/an/a
Trading data

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MFSB
BRTR
Last sale
9/16/2026 at 1:30 PM
$24.26
$48.45
Previous close
09/16/2026
$24.23
$48.48
Consolidated volume
09/16/2026
Average volume
30 days
Average discount or premium
30 days
Average Bid/Ask spread
30 days
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Main metrics
Last update 9/16/2026 at 1:30 PM
Live
Closed
MFSB
BRTR
Last price
$24.26
$48.45
1D performance
+0.12%
-0.06%
AuM$573.83 M$765.81 M
E/R0.34%0.41%
Characteristics
MFSB
BRTR
Management strategyActiveActive
ProviderMFSiShares
Benchmark--
N° of holdings2366540
Asset class--
Trailing 12m distribution yield
Join
Join
Inception dateDecember 4, 2024December 12, 2023
ESGNoNo
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Exposure

Countries

MFSB
USA
57.02%
Other
42.98%
BRTR
Data will be available soon

Sectors

MFSB
Sovereign
26.57%
Finance
20.22%
Industrials
8.04%
Other
45.17%
BRTR
Data will be available soon
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Diversification

MFSB

Total weight of top 15 holdings out of 15

27.06%
BRTR
Data will be available soon

Top 15 holdings

Data as of July 31, 2026
MFSB
USA, Bonds 4.625% 15nov2045, USD
8.86%
USA, Bonds 4.625% 15nov2055, USD
4.10%
USA, Notes 3.875% 31jul2030, USD (AB-2030)
4.06%
USA, Notes 4.125% 31oct2029, USD (AF-2029)
2.59%
USA, Bonds 4.625% 15nov2044, USD
0.96%
USA, Bonds 4.875% 15aug2045, USD
0.93%
USA, Bonds 4.5% 15nov2054, USD
0.92%
Boston Properties LP, 5.75% 15jan2035, USD
0.69%
Bank of America Corporation, 5.744% 12feb2036, USD (N)
0.64%
US01F0306864
0.59%
US12570XAQ51
0.57%
USA, Bonds 4.25% 15feb2054, USD
0.56%
Highwoods Realty, 5.35% 15jan2033, USD
0.54%
Boeing, 6.528% 1may2034, USD
0.53%
JP Morgan, 4.946% 22oct2035, USD
0.52%
BRTR
Data will be available soon
Frequently asked questions about MFSB and BRTR

How have the MFSB and BRTR ETFs performed in 2026?

As of September 16, 2026, MFSB is down -0.77% year-to-date (YTD), while BRTR has lost -1.51%. That puts MFSB better performer ahead so far this year.

Which ETF is attracting more investor money: MFSB or BRTR?

Year-to-date, the MFSB ETF saw +$432M in flows, compared to +$288M for BRTR.

Which ETF is more volatile: MFSB or BRTR?

Over the past year, MFSB had a volatility of 3.32%, while BRTR experienced 3.77%.

Which ETF is bigger: MFSB or BRTR?

As of September 16, 2026, MFSB holds $573.83 M in assets under management (AUM), while BRTR manages $765.81 M.

What sectors do the MFSB and BRTR ETFs invest in?

MFSB leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, BRTR focuses on Sovereign and Industrials.

What are the top holdings of the MFSB ETF and BRTR ETF?

MFSB top holdings include USA, Bonds 4.625% 15nov2045, USD, USA, Bonds 4.625% 15nov2055, USD and USA, Notes 3.875% 31jul2030, USD (AB-2030). BRTR holds in its top three: US01F0526800, BlackRock Cash Funds - Institutional and USA, Bonds 4.75% 15nov2043, USD.

Which ETF is more diversified: MFSB or BRTR?

MFSB holds 457 securities with 27.06% of its assets in the top 15. BRTR has 8924 securities and a top 15 weight of 39.43%.

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