Which returned more over the last year, MBB or SHY?

In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and SHY +1.6%.

Which is cheaper, MBB or SHY?

MBB is cheaper, by 0.11 percentage points a year. That is about $11 on $10,000 held for a year. Fees come from each fund's prospectus.

Data as of Oct 28, 2026.

Across categories

MBB vs SHY: Differences, Returns & Fees

Share on X Download as PDF

On Aug 31, 2026 MBB's duration was 5.7 years and SHY's 1.8; MBB charges 0.04% to SHY's 0.15%.

askIQ about this page

askIQ about MBB and SHY

Net assets: $35.5bn on Oct 28, 2026 for iShares MBS ETF, and $27.4bn on Oct 27, 2026 for iShares 1-3 Year Treasury Bond ETF.

MBB on its own →SHY on its own →

At a glance

−0.8%

MBB total return, 1 year

+1.6%

SHY total return, 1 year

0.04%

MBB expense ratio

0.15%

SHY expense ratio

Pair scorecard

MBB costs 0.11 points a year less; their one-year returns differ by 2.4 points; MBB is 1.3 times larger.

MBB vs SHY: Differences, Returns & Fees
Measure	MBB	SHY
Return
Measure	MBB	SHY
Total return, 1 year	−0.8%	+1.6%
Benchmark
Measure	MBB	SHY
What it tracks	Bloomberg U.S. MBS Index	ICE U.S. Treasury 1-3 Year Bond Index
Cost and size
Measure	MBB	SHY
Expense ratio	0.04%	0.15%
Net assets, as of Oct 26, 2026	$35.6bn	$27.3bn
Holdings
Measure	MBB	SHY
Holdings in common	0%

Holdings in common uses holdings dated Aug 31, 2026. Method

What they share

By the books each fund has filed, MBB and SHY hold 0% of their money in the same securities at the same weight. Holdings dated Aug 31, 2026.

50%

0 half 100%

half

0% in common

Positions both hold · largest shared weight first MBB SHY

Only in one fund ↓

Only in MBB

Ginnie Mae, due Sep 1, 2056 1.05%

Freddie Mac Pool, due May 1, 2051 0.98%

Uniform Mortgage-Backed Security, TBA, due Sep 1, 2056 0.85%

Uniform Mortgage-Backed Security, TBA, due Sep 1, 2056 0.70%

Ginnie Mae, due Sep 1, 2056 0.53%

Ginnie Mae II Pool, due Nov 20, 2054 0.51%

Ginnie Mae II Pool, due Oct 20, 2051 0.51%

Ginnie Mae II Pool, due Dec 20, 2051 0.50%

Only in SHY

U.S. Treasury Notes, due Apr 30, 2028 1.97%

U.S. Treasury Notes, due Jan 31, 2028 1.71%

U.S. Treasury Notes, due Jun 30, 2028 1.61%

U.S. Treasury Notes, due Apr 30, 2029 1.51%

U.S. Treasury Notes, due May 31, 2029 1.49%

U.S. Treasury Notes, due Aug 15, 2027 1.48%

U.S. Treasury Notes, due Jun 30, 2029 1.47%

U.S. Treasury Notes, due Feb 15, 2028 1.40%

Check overlap with more funds →

Side by side

MBB iShares MBS ETF SHY iShares 1-3 Year Treasury Bond ETF

Where it sits Bond ETF Bond ETF

Issuer iShares iShares

What it is Tracks an index of mortgage-backed securities Tracks an index of 1-3 Year Treasury Bond

Total return, 1 year −0.8% +1.6%

Its benchmark over the same days −1.1% (SPMB) +1.7% (BBSB)

Gap to its benchmark +0.3 pts vs SPMB −0.1 pts vs BBSB

Expense ratio 0.04% 0.15%

Holdings 10813 90

Net assets, MBB as of Oct 28, 2026 and SHY as of Oct 27, 2026 $35.5bn $27.4bn

MBB and SHY on the fields both publish, as of Oct 28, 2026. Source: ETFIQ.

Alert

About each fund

MBB

MBB tracks an index of mortgage-backed securities. Over the year to Oct 28, 2026 it returned −0.8% with distributions reinvested, against −1.1% for its benchmark, the Bloomberg U.S. MBS Index. The prospectus expense ratio is 0.04% a year.

SHY

SHY tracks an index of 1-3 Year Treasury Bond. Over the year to Oct 28, 2026 it returned +1.6% with distributions reinvested, against +1.7% for its benchmark, the ICE U.S. Treasury 1-3 Year Bond Index. The prospectus expense ratio is 0.15% a year.

Questions people ask

Which returned more over the last year, MBB or SHY?: In the year to Oct 28, 2026, with distributions reinvested, MBB returned −0.8% and SHY +1.6%.
Which is cheaper, MBB or SHY?: MBB is cheaper, by 0.11 percentage points a year. That is about $11 on $10,000 held for a year. Fees come from each fund's prospectus.

Other comparisons

MBB vs VGSH IEI vs MBB MBB vs USHY MBB vs VTIP BIL vs SHY BINC vs SHY SHY vs TIP PFF vs SHY

Where to next

MBB on its own →SHY on its own →Hold both: look the portfolio through →Rankings →MBB dividend history →MBB holdings →SHY dividend history →SHY holdings →Standards and sources →

Sources and dates

MBB and SHY filings on SEC EDGAR ↗

MBB and SHY prospectus with the expense ratio (SEC) ↗

iShares page for MBB ↗

iShares page for SHY ↗

Links are sources, not endorsements. 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, MBB against SHY, data as of Oct 28, 2026. https://etfiq.com/compare/any/mbb-vs-shy

Open data →

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