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VMBSvsMBBAETF Comparison

ETF 1

VMBS

Vanguard Mortgage-Backed Securities ETF

This fund is part of

MBS & ABS

-0.16%

Full VMBS fund page

VS

ETF 2

MBBA

iShares Mortgage-Backed Securities Active ETF

This fund is part of

MBS & ABS

-0.16%

Full MBBA fund page

Vanguard Mortgage-Backed Securities ETF (VMBS) and iShares Mortgage-Backed Securities Active ETF (MBBA) belong to the same industry segment: MBS & ABS. VMBS's top 3 sector exposures are Industrials, Finance and Government Agencies. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. VMBS is less expensive with a Total Expense Ratio (TER) of 0.03%, versus 0.26% for MBBA. Run a side-by-side ETF comparison of VMBS and MBBA 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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VMBS vs MBBA 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 09/09/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	VMBS MBBA	-0.36%-0.03%	-0.61%-0.17%	-0.77%n/a	+0.86%n/a	+14.62%n/a	+0.62%n/a
Flows	VMBS MBBA	+$356M+$4M	+$713M+$35M	+$1.43B-	+$1.33B-	-$727M-	+$3.08B-

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	VMBS MBBA	+4.23%+4.64%	+3.79%n/a	+5.49%n/a	+6.44%n/a
Max drawdown	VMBS MBBA	-1.66%-2.02%	-3.31%n/a	-5.47%n/a	-16.91%n/a
Max drawdown duration	VMBS MBBA	72d71d	192dn/a	75dn/a	1459dn/a

Trading data

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	VMBS	MBBA
Last sale 9/10/2026 at 7:09 PM	$45.39	$48.46
Previous close 09/09/2026	$45.71	$48.67
Consolidated volume 09/09/2026
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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MBBA

is actively managed and doesn’t replicate an index

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

Main metrics

Last update 9/10/2026 at 7:09 PM

Live

Closed

	VMBS	MBBA
Last price	$45.39	$48.46
1D performance	-0.70%	-0.44%
AuM	$15.83 B	$156.59 M
E/R	0.03%	0.26%

Characteristics

	VMBS	MBBA
Management strategy	Passive	Active
Provider	Vanguard	iShares
Benchmark	Bloomberg U.S. MBS Float Adjusted Index	-
N° of holdings	701	25
Asset class	Bonds	-
Trailing 12m distribution yield	Join	Join
Inception date	November 19, 2009	January 23, 2026
ESG	No	No

More VMBS data on Trackinsight

More MBBA data on Trackinsight

Exposure

Countries

VMBS

USA

26.52%

Other

73.48%

MBBA

Data will be available soon

Sectors

VMBS

Industrials

26.09%

Other

73.91%

MBBA

Data will be available soon

Diversification

VMBS

Total weight of top 15 holdings out of 15

3.98%

MBBA

Data will be available soon

Top 15 holdings

Data as of July 31, 2026

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%

MBBA

Data will be available soon

Frequently asked questions about VMBS and MBBA

Which ETF is bigger: VMBS or MBBA?

As of September 9, 2026, VMBS holds $15.83 B in assets under management (AUM), while MBBA manages $156.59 M.

What sectors do the VMBS and MBBA ETFs invest in?

VMBS leans toward sectors like Industrials. Meanwhile, MBBA focuses on Industrials and Non-Corporate.

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

VMBS top holdings include US21H0526861, G2 MB0025, 5% 20nov2054, USD (ABS) and US3618N56H72. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.

VMBSvsMBBAETF Comparison

Vanguard Mortgage-Backed Securities ETF

iShares Mortgage-Backed Securities Active ETF

VMBS vs MBBA 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

Which ETF is bigger: VMBS or MBBA?

As of September 9, 2026, VMBS holds $15.83 B in assets under management (AUM), while MBBA manages $156.59 M.

What sectors do the VMBS and MBBA ETFs invest in?

VMBS leans toward sectors like Industrials. Meanwhile, MBBA focuses on Industrials and Non-Corporate.

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

VMBS top holdings include US21H0526861, G2 MB0025, 5% 20nov2054, USD (ABS) and US3618N56H72. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.

Which ETF is more diversified: VMBS or MBBA?

VMBS holds 5140 securities with 3.98% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.

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