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AGG vs SPAB: Differences, Returns & Fees

AGG's duration was 5.8 years on May 31, 2026 and SPAB's 5.9 on Jun 30, 2026; both charge 0.03%. Net assets: $137.1bn on Oct 9, 2026 for iShares Core U.S. Aggregate Bond ETF, and $9.9bn on Oct 8, 2026 for State Street SPDR Portfolio Aggregate Bond ETF.

Both cost 0.03% a year; both returned −1.6% over a year; AGG is 13.8 times larger.

Points (pts) are percentage points.

AGGSPAB
Expense ratio0.03%0.03%
Net assets, as of Oct 8, 2026$137.1bn$9.9bn
Total return, 1 year−1.6%−1.6%
What it tracksBloomberg U.S. Aggregate Bond IndexBloomberg U.S. Aggregate Bond Index ?
Holdings in common57%
Below its high4.7%, high on Aug 4, 20204.9%, high on Aug 4, 2020

Holdings in common uses holdings dated May 31, 2026 and Jun 30, 2026.

−1.6%
AGG total return, 1 year
−1.6%
SPAB total return, 1 year
0.03%
AGG expense ratio
0.03%
SPAB expense ratio

What they hold in common

By the books each fund has filed, AGG and SPAB hold 57% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated May 31, 2026 and Jun 30, 2026.

half

57% in common

Positions both hold, largest shared weight first
Holding AGG SPAB
U.S. Treasury Notes, due Nov 15, 2034 0.41% 0.40%
U.S. Treasury Notes, due Aug 15, 2035 0.39% 0.40%
U.S. Treasury Notes, due May 15, 2034 0.38% 0.37%
U.S. Treasury Notes, due Nov 15, 2033 0.40% 0.37%
U.S. Treasury Notes, due Feb 15, 2035 0.42% 0.37%
U.S. Treasury Notes, due Aug 15, 2034 0.40% 0.37%
U.S. Treasury Notes, due Feb 15, 2036 0.37% 0.36%
U.S. Treasury Notes, due Feb 15, 2034 0.39% 0.34%
U.S. Treasury Notes, due May 15, 2035 0.39% 0.34%
U.S. Treasury Notes, due Nov 15, 2035 0.39% 0.33%
U.S. Treasury Notes, due Aug 15, 2033 0.35% 0.32%
U.S. Treasury Notes, due Feb 28, 2031 0.31% 0.34%
Only in AGG
U.S. Treasury Notes, due May 15, 2032 0.33%
U.S. Treasury Notes, due Nov 15, 2031 0.32%
U.S. Treasury Notes, due May 31, 2027 0.24%
U.S. Treasury Notes, due Jun 30, 2027 0.24%
U.S. Treasury Notes, due May 15, 2027 0.22%
U.S. Treasury Notes, due Jun 30, 2027 0.21%
Uniform Mortgage-Backed Security, TBA, due Jun 1, 2056 0.20%
U.S. Treasury Notes, due May 15, 2030 0.19%
Only in SPAB
U.S. Treasury Notes, due May 31, 2033 0.31%
Ginnie Mae, due Jul 20, 2056 0.28%
Uniform Mortgage-Backed Security, TBA, due Jul 1, 2056 0.27%
Uniform Mortgage-Backed Security, TBA, due Jul 1, 2056 0.23%
U.S. Treasury Bonds, due May 15, 2056 0.23%
U.S. Treasury Notes, due May 31, 2031 0.22%
Ginnie Mae II Pool, due Jun 20, 2056 0.21%
Freddie Mac Pool, due Feb 1, 2056 0.20%

Check overlap with more funds →

On the same fields

AGG
iShares Core U.S. Aggregate Bond ETF
SPAB
State Street SPDR Portfolio Aggregate Bond ETF
Where it sits Bond ETF Bond ETF
Issuer iShares State Street
What it is Tracks an index of US aggregate bonds Tracks an index
Total return, 1 year −1.6% −1.6%
S&P 500 over the same days +17.3% +17.3%
Gap to the S&P 500 −18.8 pts −18.8 pts
Expense ratio 0.03% 0.03%
Holdings 13402 8690
Net assets, AGG as of Oct 9, 2026 and SPAB as of Oct 8, 2026 $137.1bn $9.9bn

AGG and SPAB on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.

AGG in plain words

AGG tracks an index of US aggregate bonds. Over the year to Oct 9, 2026 it returned −1.6% with distributions reinvested, against −1.6% for its benchmark, the Bloomberg U.S. Aggregate Bond Index. The prospectus expense ratio is 0.03% a year. It sat 4.7% below its high of Aug 4, 2020 on Oct 9, 2026.

SPAB in plain words

SPAB tracks an index. Over the year to Oct 9, 2026 it returned −1.6% with distributions reinvested, against −1.6% for its benchmark, the Bloomberg U.S. Aggregate Bond Index ?. It sat 4.9% below its high of Aug 4, 2020 on Oct 9, 2026.

Questions people ask

Which returned more over the last year, AGG or SPAB?
In the year to Oct 9, 2026, with distributions reinvested, AGG returned −1.6% and SPAB −1.6%.
Which is cheaper, AGG or SPAB?
Neither: AGG and SPAB both charge 0.03% a year. Fees come from each fund's prospectus.
Other comparisons
AGG vs SCHZAGG vs DFCFAGG vs JBNDAGG vs VCRBSPAB vs VCRBCGCB vs SPABEAGG vs SPABFLCB vs SPAB
AGG on its own →SPAB on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
AGG filings on SEC EDGAR ↗AGG prospectus with the expense ratio (SEC) ↗iShares page for AGG ↗SPAB filings on SEC EDGAR ↗SPAB prospectus with the expense ratio (SEC) ↗State Street website ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

How this is computed

Overlap adds up the smaller of the two weights for each security both funds hold.

Cite this pageCitation, APA and Markdown

ETFIQ, AGG against SPAB, data as of Oct 9, 2026. https://etfiq.com/compare/any/agg-vs-spab

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.