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MFSMvsVMBSETF Comparison

ETF 1

MFSM

MFS Active Intermediate Muni Bond ETF

This fund is part of

Municipal Bonds

-0.01%

Full MFSM fund page

VS

ETF 2

VMBS

Vanguard Mortgage-Backed Securities ETF

This fund is part of

MBS & ABS

-0.04%

Full VMBS fund page

MFS Active Intermediate Muni Bond ETF (MFSM) belongs to the Municipal Bonds segment. Vanguard Mortgage-Backed Securities ETF (VMBS) is part of the MBS & ABS segment. MFSM's top 1 sector exposures are Municipal. In contrast, VMBS's top sector exposures are Industrials, Finance and Government Agencies. MFSM is more expensive with a Total Expense Ratio (TER) of 0.34%, versus 0.03% for VMBS. MFSM is up 0.05% year-to-date (YTD) with +$53M in YTD flows. VMBS performs worse with -0.44% YTD performance, and +$1.43B in YTD flows. Run a side-by-side ETF comparison of MFSM and VMBS 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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MFSM vs VMBS performance and flow charts

Performance

Cumulative Flows

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

Data Services

Historic performance and flows

Data as of 09/08/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	MFSM VMBS	-1.35%-0.03%	-1.82%-0.05%	+0.05%-0.44%	+2.48%+0.96%	n/a+14.97%	n/a+0.84%
Flows	MFSM VMBS	+$2M+$355M	+$7M+$788M	+$53M+$1.43B	+$57M+$1.33B	--$717M	-+$3.04B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	MFSM VMBS	+2.44%+4.21%	+2.17%+3.78%	n/a+5.49%	n/a+6.43%
Max drawdown	MFSM VMBS	-2.36%-1.66%	-2.48%-3.31%	n/a-5.47%	n/a-16.91%
Max drawdown duration	MFSM VMBS	64d71d	117d191d	n/a75d	n/a1459d

Trading data

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	MFSM	VMBS
Last sale 9/9/2026 at 1:30 PM	$24.32	$45.71
Previous close 09/08/2026	$24.41	$45.82
Consolidated volume 09/08/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of August 31, 2026

1-year trailing difference

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MFSM

is actively managed and doesn’t replicate an index

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	MFSM	VMBS
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 9/9/2026 at 1:30 PM

Live

Closed

	MFSM	VMBS
Last price	$24.32	$45.71
1D performance	-0.39%	-0.24%
AuM	$103.16 M	$15.88 B
E/R	0.34%	0.03%

Characteristics

	MFSM	VMBS
Management strategy	Active	Passive
Provider	MFS	Vanguard
Benchmark	-	Bloomberg U.S. MBS Float Adjusted Index
N° of holdings	103	701
Asset class	-	Bonds
Trailing 12m distribution yield	Join	Join
Inception date	December 4, 2024	November 19, 2009
ESG	No	No

More MFSM data on Trackinsight

More VMBS data on Trackinsight

Exposure

Countries

MFSM

USA

27.33%

Other

72.67%

VMBS

USA

26.52%

Other

73.48%

Sectors

MFSM

Municipal

27.33%

Other

72.67%

VMBS

Industrials

26.09%

Other

73.91%

Diversification

MFSM

Total weight of top 15 holdings out of 15

10.5%

VMBS

Total weight of top 15 holdings out of 15

3.98%

Top 15 holdings

Data as of July 31, 2026

MFSM

US49126RAC07

1.00%

US60416UV512

0.94%

Oklahoma Public Property Authority, 5% 1jun2034, USD (2026)

0.83%

Missouri Health and Educational Facilities Authority, 5% 1apr2036, USD (2026A)

0.83%

US708692CB22

0.75%

California Community Choice Financing Authority, 5% 1dec2055, USD (2025C)

0.72%

US763056DQ86

0.72%

US702538FE43

0.71%

US95235TAW36

0.69%

Paulding Hospital Authority, 5% 1apr2036, USD

0.55%

St. Cloud, 5% 1may2036, USD (2026)

0.55%

US164555EB63

0.55%

US49121DAB82

0.55%

US75989FAM59

0.55%

St. Tammany Parish Hospital Service District №1, 5% 1jul2056, USD (2026A)

0.55%

VMBS

US21H0526861

0.38%

G2 MB0025, 5% 20nov2054, USD (ABS)

0.29%

US3618N56H72

0.29%

US01F0506927

0.28%

US3618N6K636

0.27%

US3140Y9B864

0.27%

US3618N6BE68

0.27%

G2 MB0024, 4.5% 20nov2054, USD (ABS)

0.26%

US3132E0TL66

0.25%

US3142J6DY61

0.25%

US3618N6HU47

0.24%

FR SD8146, 2% 1may2051, USD (ABS)

0.24%

US3618N6FL65

0.23%

US3142J6C840

0.23%

FR RQ0056, 5.5% 1oct2055, USD (ABS)

0.22%

Frequently asked questions about MFSM and VMBS

How have the MFSM and VMBS ETFs performed in 2026?

As of September 8, 2026, MFSM is up 0.05% year-to-date (YTD), while VMBS has lost -0.44%. That puts MFSM better performer ahead so far this year.

Which ETF is attracting more investor money: MFSM or VMBS?

Year-to-date, the MFSM ETF saw +$53M in flows, compared to +$1.43B for VMBS.

Which ETF is more volatile: MFSM or VMBS?

Over the past year, MFSM had a volatility of 2.17%, while VMBS experienced 3.78%.

Which ETF is bigger: MFSM or VMBS?

As of September 8, 2026, MFSM holds $103.16 M in assets under management (AUM), while VMBS manages $15.88 B.

What sectors do the MFSM and VMBS ETFs invest in?

MFSM leans toward sectors like Municipal. Meanwhile, VMBS focuses on Industrials.

What are the top holdings of the MFSM ETF and VMBS ETF?

MFSM top holdings include US49126RAC07, US60416UV512 and Oklahoma Public Property Authority, 5% 1jun2034, USD (2026). VMBS holds in its top three: US21H0526861, G2 MB0025, 5% 20nov2054, USD (ABS) and US3618N56H72.

Which ETF is more diversified: MFSM or VMBS?

MFSM holds 409 securities with 10.5% of its assets in the top 15. VMBS has 5140 securities and a top 15 weight of 3.98%.

What's the Fund | MFS Active Intermediate Muni Bond ETF (MFSM)

July 25, 2025

MFSM

MFSMvsVMBSETF Comparison

MFS Active Intermediate Muni Bond ETF

Vanguard Mortgage-Backed Securities ETF

MFSM vs VMBS performance and flow charts

Performance

Cumulative Flows

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

Countries

Sectors

Diversification

Top 15 holdings

How have the MFSM and VMBS ETFs performed in 2026?

As of September 8, 2026, MFSM is up 0.05% year-to-date (YTD), while VMBS has lost -0.44%. That puts MFSM better performer ahead so far this year.

Which ETF is attracting more investor money: MFSM or VMBS?

Year-to-date, the MFSM ETF saw +$53M in flows, compared to +$1.43B for VMBS.

Which ETF is more volatile: MFSM or VMBS?

Over the past year, MFSM had a volatility of 2.17%, while VMBS experienced 3.78%.

Which ETF is bigger: MFSM or VMBS?

As of September 8, 2026, MFSM holds $103.16 M in assets under management (AUM), while VMBS manages $15.88 B.

What sectors do the MFSM and VMBS ETFs invest in?

MFSM leans toward sectors like Municipal. Meanwhile, VMBS focuses on Industrials.

What are the top holdings of the MFSM ETF and VMBS ETF?

MFSM top holdings include US49126RAC07, US60416UV512 and Oklahoma Public Property Authority, 5% 1jun2034, USD (2026). VMBS holds in its top three: US21H0526861, G2 MB0025, 5% 20nov2054, USD (ABS) and US3618N56H72.

Which ETF is more diversified: MFSM or VMBS?

MFSM holds 409 securities with 10.5% of its assets in the top 15. VMBS has 5140 securities and a top 15 weight of 3.98%.

What's the Fund | MFS Active Intermediate Muni Bond ETF (MFSM)

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