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SMBSvsMBBAETF Comparison

ETF 1

SMBS

Schwab Mortgage-Backed Securities ETF

This fund is part of

MBS & ABS

-0.35%

Full SMBS fund page

VS

ETF 2

MBBA

iShares Mortgage-Backed Securities Active ETF

This fund is part of

MBS & ABS

-0.35%

Full MBBA fund page

Schwab Mortgage-Backed Securities ETF (SMBS) and iShares Mortgage-Backed Securities Active ETF (MBBA) belong to the same industry segment: MBS & ABS. SMBS's top 3 sector exposures are Industrials, Finance and Government Agencies. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. SMBS 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 SMBS 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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SMBS 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 08/28/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	SMBS MBBA	-0.07%-0.12%	-0.35%-0.46%	+0.46%n/a	+3.16%n/a	n/an/a	n/an/a
Flows	SMBS MBBA	+$113M+$5M	+$277M+$35M	+$869M-	+$1.26B-	--	--

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	SMBS MBBA	+4.38%+4.72%	+3.93%n/a	n/an/a	n/an/a
Max drawdown	SMBS MBBA	-1.75%-2.02%	-2.67%n/a	n/an/a	n/an/a
Max drawdown duration	SMBS MBBA	60d60d	180dn/a	n/an/a	n/an/a

Trading data

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	SMBS	MBBA
Last sale 8/28/2026 at 1:30 PM	$25.00	$48.87
Previous close 08/27/2026	$25.09	$49.08
Consolidated volume 08/27/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of July 31, 2026

1-year trailing difference

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MBBA

is actively managed and doesn’t replicate an index

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

Main metrics

Last update 8/28/2026 at 1:30 PM

Live

Closed

	SMBS	MBBA
Last price	$25.00	$48.87
1D performance	-0.38%	-0.45%
AuM	$6.57 B	$157.46 M
E/R	0.03%	0.26%

Characteristics

	SMBS	MBBA
Management strategy	Passive	Active
Provider	Schwab ETFs	iShares
Benchmark	Bloomberg U.S. MBS Float Adjusted Index	-
N° of holdings	443	25
Asset class	Bonds	-
Trailing 12m distribution yield	Join	Join
Inception date	November 19, 2024	January 23, 2026
ESG	No	No

More SMBS data on Trackinsight

More MBBA data on Trackinsight

Exposure

Countries

SMBS

USA

34%

Other

66%

MBBA

Data will be available soon

Sectors

SMBS

Industrials

33.45%

Other

66.55%

MBBA

Data will be available soon

Diversification

SMBS

Total weight of top 15 holdings out of 15

5.64%

MBBA

Data will be available soon

Top 15 holdings

Data as of July 31, 2026

SMBS

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

0.67%

FR SD8469, 5.5% 1oct2054, USD (ABS)

0.49%

US31418DYX47

0.40%

US31427R6E50

0.39%

FR SD8193, 2% 1feb2052, USD (ABS)

0.37%

FR SD8106, 2% 1nov2050, USD (ABS)

0.35%

US3618N6HU47

0.35%

US3618N56H72

0.35%

US3618N53X59

0.35%

FR RQ0110, 5% 1apr2056, USD (ABS)

0.34%

FR RQ0102, 5% 1mar2056, USD (ABS)

0.34%

US3132DWDC47

0.33%

FR SD7552, 2.5% 1jan2052, USD (ABS)

0.31%

US3142J6BK85

0.30%

US3132DWAN39

0.30%

MBBA

Data will be available soon

Frequently asked questions about SMBS and MBBA

Which ETF is bigger: SMBS or MBBA?

As of August 28, 2026, SMBS holds $6.57 B in assets under management (AUM), while MBBA manages $157.46 M.

What sectors do the SMBS and MBBA ETFs invest in?

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

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

SMBS top holdings include G2 MB0025, 5% 20nov2054, USD (ABS), FR SD8469, 5.5% 1oct2054, USD (ABS) and US31418DYX47. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.

SMBSvsMBBAETF Comparison

Schwab Mortgage-Backed Securities ETF

iShares Mortgage-Backed Securities Active ETF

SMBS 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: SMBS or MBBA?

As of August 28, 2026, SMBS holds $6.57 B in assets under management (AUM), while MBBA manages $157.46 M.

What sectors do the SMBS and MBBA ETFs invest in?

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

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

SMBS top holdings include G2 MB0025, 5% 20nov2054, USD (ABS), FR SD8469, 5.5% 1oct2054, USD (ABS) and US31418DYX47. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.

Which ETF is more diversified: SMBS or MBBA?

SMBS holds 1999 securities with 5.64% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.

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