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SPMBvsMBBAETF Comparison

ETF 1

SPMB

State Street State Street SPDR Portfolio Mortgage Backed Bond ETF

This fund is part of

MBS & ABS

-0.05%

Full SPMB fund page

VS

ETF 2

MBBA

iShares Mortgage-Backed Securities Active ETF

This fund is part of

MBS & ABS

-0.05%

Full MBBA fund page

State Street State Street SPDR Portfolio Mortgage Backed Bond ETF (SPMB) and iShares Mortgage-Backed Securities Active ETF (MBBA) belong to the same industry segment: MBS & ABS. SPMB's top 3 sector exposures are Industrials, Finance and Government Agencies. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. SPMB is less expensive with a Total Expense Ratio (TER) of 0.04%, versus 0.26% for MBBA. Run a side-by-side ETF comparison of SPMB 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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SPMB 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 09/15/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	SPMB MBBA	-1.55%-1.77%	-2.41%-2.68%	-1.42%n/a	-0.55%n/a	+13.73%n/a	-0.90%n/a
Flows	SPMB MBBA	+$53M+$960K	+$236M+$8M	+$655M-	+$936M-	+$2.59B-	+$3.74B-

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	SPMB MBBA	+4.82%+4.80%	+4.25%n/a	+5.94%n/a	+6.72%n/a
Max drawdown	SPMB MBBA	-2.90%-3.15%	-3.51%n/a	-5.40%n/a	-17.32%n/a
Max drawdown duration	SPMB MBBA	78d78d	198dn/a	318dn/a	1491dn/a

Trading data

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	SPMB	MBBA
Last sale 9/16/2026 at 1:30 PM	$21.52	$47.80
Previous close 09/15/2026	$21.55	$47.87
Consolidated volume 09/15/2026
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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	SPMB	MBBA
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 9/16/2026 at 1:30 PM

Live

Closed

	SPMB	MBBA
Last price	$21.52	$47.80
1D performance	-0.14%	-0.15%
AuM	$7.02 B	$154.99 M
E/R	0.04%	0.26%

Characteristics

	SPMB	MBBA
Management strategy	Passive	Active
Provider	State Street Investment Management	iShares
Benchmark	Bloomberg U.S. MBS Index	-
N° of holdings	554	25
Asset class	Bonds	-
Trailing 12m distribution yield	Join	Join
Inception date	January 15, 2009	January 23, 2026
ESG	No	No

More SPMB data on Trackinsight

More MBBA data on Trackinsight

Exposure

Countries

SPMB

USA

32.64%

Other

67.36%

MBBA

Data will be available soon

Sectors

SPMB

Industrials

32.31%

Other

67.69%

MBBA

Data will be available soon

Diversification

SPMB

Total weight of top 15 holdings out of 15

9.28%

MBBA

Data will be available soon

Top 15 holdings

Data as of July 31, 2026

SPMB

US3142J6C840

1.16%

US01F0526800

0.86%

FN MA4547, 2% 1feb2052, USD (ABS)

0.78%

US3142J6BK85

0.76%

US01F0506844

0.70%

FR SD8212, 2.5% 1may2052, USD (ABS)

0.60%

US3132DWMY65

0.55%

G2 MB0424, 5.5% 20jun2055, USD (ABS)

0.54%

FN MA4701, 4.5% 1aug2052, USD (ABS)

0.51%

US01F0606834

0.50%

US21H0506806

0.49%

FN FA0608, 5.5% 1feb2055, USD (ABS)

0.49%

FN MA4465, 2% 1nov2051, USD (ABS)

0.47%

FN FS2040, 2% 1feb2052, USD (ABS)

0.44%

US3132DWKV45

0.43%

MBBA

Data will be available soon

Frequently asked questions about SPMB and MBBA

Which ETF is bigger: SPMB or MBBA?

As of September 15, 2026, SPMB holds $7.02 B in assets under management (AUM), while MBBA manages $154.99 M.

What sectors do the SPMB and MBBA ETFs invest in?

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

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

SPMB top holdings include US3142J6C840, US01F0526800 and FN MA4547, 2% 1feb2052, USD (ABS). MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.

SPMBvsMBBAETF Comparison

State Street State Street SPDR Portfolio Mortgage Backed Bond ETF

iShares Mortgage-Backed Securities Active ETF

SPMB 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: SPMB or MBBA?

As of September 15, 2026, SPMB holds $7.02 B in assets under management (AUM), while MBBA manages $154.99 M.

What sectors do the SPMB and MBBA ETFs invest in?

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

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

SPMB top holdings include US3142J6C840, US01F0526800 and FN MA4547, 2% 1feb2052, USD (ABS). MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.

Which ETF is more diversified: SPMB or MBBA?

SPMB holds 2713 securities with 9.28% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.

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