SPABvsAGGETF Comparison

ETF 1

SPAB

State Street SPDR Portfolio Aggregate Bond ETF

This fund is part of

US Aggregate Bonds

-0.26%

Full SPAB fund page

ETF 2

AGG

iShares Core U.S. Aggregate Bond ETF

This fund is part of

US Aggregate Bonds

-0.26%

Full AGG fund page

The ETFs State Street SPDR Portfolio Aggregate Bond ETF (SPAB) and iShares Core U.S. Aggregate Bond ETF (AGG) track the Bloomberg US Aggregate Total Return Index - USD and belong to the same industry segment: US Aggregate Bonds. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. Both SPAB and AGG have the same Total Expense Ratio (TER) of 0.03%. SPAB is down -0.12% year-to-date (YTD) with +$1.16B in YTD flows. AGG performs worse with -0.13% YTD performance, and +$6.49B in YTD flows. Run a side-by-side ETF comparison of SPAB and AGG 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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SPAB vs AGG performance and flow charts

Performance

Cumulative Flows

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Data Services

Historic performance and flows

Data as of 08/28/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	SPAB AGG	-0.09%-0.12%	-0.46%-0.49%	-0.12%-0.13%	+1.87%+1.85%	+13.68%+13.66%	-1.54%-1.44%
Flows	SPAB AGG	+$467M+$917M	+$699M+$4.21B	+$1.16B+$6.49B	+$1.87B+$10.67B	+$3.51B+$45.02B	+$5.06B+$64.65B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	SPAB AGG	+3.92%+3.90%	+3.70%+3.70%	+5.09%+5.06%	+5.95%+5.91%
Max drawdown	SPAB AGG	-1.72%-1.72%	-2.76%-2.73%	-4.87%-4.86%	-17.87%-17.79%
Max drawdown duration	SPAB AGG	60d60d	180d180d	284d284d	1626d1625d

Trading data

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	SPAB	AGG
Last sale 8/28/2026 at 1:30 PM	$25.12	$97.49
Previous close 08/27/2026	$25.20	$97.83
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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	SPAB	AGG
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

	SPAB	AGG
Last price	$25.12	$97.49
1D performance	-0.32%	-0.35%
AuM	$10.23 B	$138.45 B
E/R	0.03%	0.03%

Characteristics

	SPAB	AGG
Management strategy	Passive	Passive
Provider	State Street Investment Management	iShares
Benchmark	Bloomberg US Aggregate Bond Index	Bloomberg US Aggregate Bond Index
N° of holdings	7063	10356
Asset class	Bonds	Bonds
Trailing 12m distribution yield	Join	Join
Inception date	May 23, 2007	September 22, 2003
ESG	No	No

More SPAB data on Trackinsight

More AGG data on Trackinsight

Exposure

Countries

SPAB

USA

75.76%

Other

24.24%

AGG

USA

77.45%

Other

22.55%

Sectors

SPAB

Sovereign

46.7%

Finance

10.36%

Industrials

9.6%

Other

33.34%

AGG

Sovereign

47.55%

Finance

10.22%

Industrials

7.11%

Other

35.12%

Diversification

SPAB

Total weight of top 15 holdings out of 15

6.21%

AGG

Total weight of top 15 holdings out of 15

8.32%

Top 15 holdings

Data as of July 31, 2026

SPAB

USA, Notes 3.5% 15dec2028, USD (AV-2028)

0.77%

USA, Notes 4% 15nov2035, USD (F-2035)

0.46%

USA, Notes 4.375% 30nov2028, USD (AG-2028)

0.43%

USA, Notes 3.5% 31jan2028, USD (U-2028)

0.42%

USA, Notes 3.875% 31mar2031, USD (W-2031)

0.41%

USA, Notes 3.375% 31dec2027, USD (BM-2027)

0.39%

USA, Notes 4.25% 15nov2034, USD (F-2034)

0.39%

USA, Notes 4.25% 15aug2035, USD (E-2035)

0.38%

USA, Notes 4.375% 15may2036, USD (C-2036)

0.38%

US01F0526800

0.38%

USA, Notes 4.375% 15may2034, USD (C-2034)

0.36%

USA, Notes 3.875% 15aug2033, USD (E-2033)

0.36%

USA, Notes 4.5% 15nov2033, USD (F-2033)

0.36%

USA, Notes 4.625% 15feb2035, USD (B-2035)

0.36%

USA, Notes 3.875% 15aug2034, USD (E-2034)

0.36%

AGG

BlackRock Cash Funds - Institutional

2.85%

USA, Notes 4.625% 15feb2035, USD (B-2035)

0.42%

USA, Notes 4% 28feb2030, USD (H-2030)

0.41%

USA, Notes 4.25% 15nov2034, USD (F-2034)

0.41%

USA, Notes 4.375% 15may2034, USD (C-2034)

0.40%

USA, Notes 4.125% 15feb2036, USD (B-2036)

0.40%

USA, Notes 3.875% 15aug2034, USD (E-2034)

0.40%

USA, Notes 4.25% 15aug2035, USD (E-2035)

0.40%

USA, Notes 4.25% 15may2035, USD (C-2035)

0.39%

USA, Notes 4.5% 15nov2033, USD (F-2033)

0.39%

USA, Notes 4% 15feb2034, USD (B-2034)

0.39%

USA, Notes 4% 15nov2035, USD (F-2035)

0.38%

USA, Notes 3.875% 15jul2028, USD (AQ-2028)

0.36%

USA, Notes 3.875% 15jun2028, USD (AP-2028)

0.36%

USA, Notes 3.875% 15aug2033, USD (E-2033)

0.35%

Frequently asked questions about SPAB and AGG

How have the SPAB and AGG ETFs performed in 2026?

As of August 28, 2026, SPAB is down -0.12% year-to-date (YTD), while AGG has lost -0.13%. That puts SPAB better performer ahead so far this year.

Which ETF is attracting more investor money: SPAB or AGG?

Year-to-date, the SPAB ETF saw +$1.16B in flows, compared to +$6.49B for AGG.

Which ETF is more volatile: SPAB or AGG?

Over the past year, SPAB had a volatility of 3.7%, while AGG experienced 3.7%.

Which ETF is bigger: SPAB or AGG?

As of August 28, 2026, SPAB holds $10.23 B in assets under management (AUM), while AGG manages $138.45 B.

What sectors do the SPAB and AGG ETFs invest in?

SPAB leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, AGG focuses on Sovereign, Finance and Industrials.

What are the top holdings of the SPAB ETF and AGG ETF?

SPAB top holdings include USA, Notes 3.5% 15dec2028, USD (AV-2028), USA, Notes 4% 15nov2035, USD (F-2035) and USA, Notes 4.375% 30nov2028, USD (AG-2028). AGG holds in its top three: BlackRock Cash Funds - Institutional, USA, Notes 4.625% 15feb2035, USD (B-2035) and USA, Notes 4% 28feb2030, USD (H-2030).

SPABvsAGGETF Comparison

State Street SPDR Portfolio Aggregate Bond ETF

iShares Core U.S. Aggregate Bond ETF

SPAB vs AGG 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 SPAB and AGG ETFs performed in 2026?

As of August 28, 2026, SPAB is down -0.12% year-to-date (YTD), while AGG has lost -0.13%. That puts SPAB better performer ahead so far this year.

Which ETF is attracting more investor money: SPAB or AGG?

Year-to-date, the SPAB ETF saw +$1.16B in flows, compared to +$6.49B for AGG.

Which ETF is more volatile: SPAB or AGG?

Over the past year, SPAB had a volatility of 3.7%, while AGG experienced 3.7%.

Which ETF is bigger: SPAB or AGG?

As of August 28, 2026, SPAB holds $10.23 B in assets under management (AUM), while AGG manages $138.45 B.

What sectors do the SPAB and AGG ETFs invest in?

SPAB leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, AGG focuses on Sovereign, Finance and Industrials.

What are the top holdings of the SPAB ETF and AGG ETF?

Which ETF is more diversified: SPAB or AGG?

SPAB holds 8468 securities with 6.21% of its assets in the top 15. AGG has 13243 securities and a top 15 weight of 8.32%.

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