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SPAB vs TAGG: Differences, Returns & Fees

SPAB's duration was 5.9 years on Jun 30, 2026 and TAGG's 5.8 on Jul 31, 2026; SPAB charges 0.03% to TAGG's 0.08%. Net assets: $9.9bn on Oct 8, 2026 for State Street SPDR Portfolio Aggregate Bond ETF, and $2.7bn on Oct 9, 2026 for T. Rowe Price QM U.S. Bond ETF.

SPAB costs 0.05 points a year less; their one-year returns differ by 0.2 points; SPAB is 3.7 times larger.

SPABTAGG
Expense ratio0.03%0.08%
Net assets, as of Oct 8, 2026$9.9bn$2.7bn
Total return, 1 year−1.6%−1.4%
What it tracksBloomberg U.S. Aggregate Bond Index ?No index, actively managed
Holdings in common15%
Below its high4.9%, high on Aug 4, 20204.5%, high on Feb 27, 2026

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

−1.6%
SPAB total return, 1 year
−1.4%
TAGG total return, 1 year
0.03%
SPAB expense ratio
0.08%
TAGG expense ratio

What they hold in common

By the books each fund has filed, SPAB and TAGG hold 15% 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 Jun 30, 2026 and Jul 31, 2026.

half

15% in common

Positions both hold, largest shared weight first
Holding SPAB TAGG
U.S. Treasury Notes, due Dec 15, 2028 0.79% 2.12%
U.S. Treasury Notes, due Mar 31, 2031 0.43% 0.59%
U.S. Treasury Notes, due Nov 15, 2034 0.40% 0.53%
U.S. Treasury Notes, due Aug 15, 2035 0.40% 0.38%
U.S. Treasury Notes, due Feb 15, 2036 0.36% 0.35%
U.S. Treasury Notes, due Dec 31, 2030 0.34% 0.70%
U.S. Treasury Notes, due Apr 30, 2031 0.34% 1.03%
U.S. Treasury Bonds, due Feb 15, 2046 0.32% 1.57%
U.S. Treasury Bonds, due Feb 15, 2045 0.26% 0.94%
U.S. Treasury Bonds, due Feb 15, 2056 0.25% 1.07%
U.S. Treasury Notes, due Feb 28, 2030 0.25% 1.92%
U.S. Treasury Bonds, due Nov 15, 2055 0.25% 0.33%
Only in SPAB
U.S. Treasury Notes, due Nov 30, 2028 0.44%
U.S. Treasury Notes, due Jan 31, 2028 0.42%
U.S. Treasury Notes, due Dec 31, 2027 0.39%
U.S. Treasury Notes, due Apr 30, 2028 0.38%
U.S. Treasury Notes, due May 15, 2034 0.37%
U.S. Treasury Notes, due Nov 15, 2033 0.37%
U.S. Treasury Notes, due Feb 15, 2035 0.37%
U.S. Treasury Notes, due Aug 31, 2028 0.34%
Only in TAGG
FNMA TBA 30 YR 5 SINGLE FAMILY MORTGAGE, due Jan 1, 2033 0.76%
FNMA TBA 30 YR 4 SINGLE FAMILY MORTGAGE, due Jan 1, 2040 0.66%
FNMA TBA 30 YR 2 SINGLE FAMILY MORTGAGE, due Jan 1, 2050 0.60%
FNMA TBA 30 YR 5.5 SINGLE FAMILY MORTGAGE, due Jan 1, 2033 0.59%
FNMA POOL MA4492 FN 12/51 FIXED 2, due Dec 1, 2051 0.44%
GNMA II TBA 30 YR 4.5 JUMBOS, due Jan 1, 2035 0.44%
NYC COMMERCIAL MORTGAGE TRUST NYC 2026 9W57 A 144A, due Jun 6, 2040 0.43%
GNMA II TBA 30 YR 5.5 JUMBOS, due Jan 1, 2033 0.42%

Check overlap with more funds →

On the same fields

SPAB
State Street SPDR Portfolio Aggregate Bond ETF
TAGG
T. Rowe Price QM U.S. Bond ETF
Where it sits Bond ETF Bond ETF
Issuer State Street T. Rowe Price
What it is Tracks an index Actively managed
Total return, 1 year −1.6% −1.4%
S&P 500 over the same days +17.3% +17.3%
Gap to the S&P 500 −18.8 pts −18.7 pts
Expense ratio 0.03% 0.08%
Holdings 8690 1815
Net assets, SPAB as of Oct 8, 2026 and TAGG as of Oct 9, 2026 $9.9bn $2.7bn

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

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 ?. The prospectus expense ratio is 0.03% a year. It sat 4.9% below its high of Aug 4, 2020 on Oct 9, 2026.

TAGG in plain words

TAGG is actively managed and tracks no index. Over the year to Oct 9, 2026 it returned −1.4% with distributions reinvested, against −1.6% for its benchmark, the Bloomberg U.S. Aggregate Bond Index. The prospectus expense ratio is 0.08% a year. It sat 4.5% below its high of Feb 27, 2026 on Oct 9, 2026.

Questions people ask

Which returned more over the last year, SPAB or TAGG?
In the year to Oct 9, 2026, with distributions reinvested, SPAB returned −1.6% and TAGG −1.4%.
Which is cheaper, SPAB or TAGG?
SPAB is cheaper, by 0.05 percentage points a year. That is about $5 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
AVIG vs SPABSPAB vs UNIYBIV vs SPABAGG vs SPABCGCB vs TAGGEAGG vs TAGGBIV vs TAGGFLCB vs TAGG
SPAB on its own →TAGG on its own →Hold both: look the portfolio through →Rankings →Standards and sources →
Where these figures came from
SPAB filings on SEC EDGAR ↗SPAB prospectus with the expense ratio (SEC) ↗State Street website ↗TAGG filings on SEC EDGAR ↗TAGG prospectus with the expense ratio (SEC) ↗T. Rowe Price 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, SPAB against TAGG, data as of Oct 9, 2026. https://etfiq.com/compare/any/spab-vs-tagg

Open data

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