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Data as of Oct 28, 2026.

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EMB vs MBB: Differences, Returns & Fees

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EMB's duration was 6.5 years on Jul 31, 2026 and MBB's 5.7 on Aug 31, 2026; MBB charges 0.04% to EMB's 0.39%.

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Net assets on Oct 28, 2026: $13.2bn for iShares J.P. Morgan USD Emerging Markets Bond ETF and $35.5bn for iShares MBS ETF.

EMB on its own →MBB on its own →
At a glance
−0.4%
EMB total return, 1 year
−0.8%
MBB total return, 1 year
0.39%
EMB expense ratio
0.04%
MBB expense ratio

Pair scorecard

MBB costs 0.35 points a year less; their one-year returns differ by 0.4 points; MBB is 2.7 times larger.

EMB vs MBB: Differences, Returns & Fees
MeasureEMBMBB
Return
Total return, 1 year−0.4%−0.8%
Drawdown
Below its high3.5%, high on Jun 29, 2026
Benchmark
What it tracksJ.P. Morgan EMBI Global Core IndexBloomberg U.S. MBS Index
Cost and size
Expense ratio0.39%0.04%
Net assets$13.2bn$35.5bn
Holdings
Holdings in common0%

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

What they share

0%

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

0 half 100%

half

0% in common

Positions both hold · largest shared weight first EMB MBB
Only in one fund ↓
Only in EMB
Argentina Republic Government International Bonds, due Jul 9, 2035 1.21%
Ecuador Government International Bonds, due Jul 31, 2035 0.78%
Argentina Republic Government International Bonds, due Jan 9, 2038 0.70%
Argentina Republic Government International Bonds, due Jul 9, 2030 0.65%
Argentina Republic Government International Bonds, due Jul 9, 2041 0.57%
Ghana Government International Bonds, due Jul 3, 2035 0.55%
Uruguay Government International Bonds, due Jun 18, 2050 0.51%
Eagle Funding Luxco Sarl, due Aug 17, 2030 0.50%
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%
Check overlap with more funds →

Side by side

EMB iShares J.P. Morgan USD Emerging Markets Bond ETF MBB iShares MBS ETF
Where it sits Bond ETF Bond ETF
Issuer iShares iShares
What it is Tracks the J.P. Morgan USD Emerging Markets Bond Tracks an index of mortgage-backed securities
Total return, 1 year −0.4% −0.8%
Its benchmark over the same days not measured −1.1% (SPMB)
Gap to its benchmark not measured +0.3 pts vs SPMB
Expense ratio 0.39% 0.04%
Holdings 622 10813
Net assets $13.2bn $35.5bn

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

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About each fund
EMB

EMB tracks the J.P. Morgan USD Emerging Markets Bond. Over the year to Oct 28, 2026 it returned −0.4% with distributions reinvested. The prospectus expense ratio is 0.39% a year. It sat 3.5% below its high of Jun 29, 2026 on Oct 28, 2026.

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.

Questions people ask

Which returned more over the last year, EMB or MBB?
In the year to Oct 28, 2026, with distributions reinvested, EMB returned −0.4% and MBB −0.8%.
Which is cheaper, EMB or MBB?
MBB is cheaper, by 0.35 percentage points a year. That is about $35 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
EMB vs VGSHEMB vs LQDEMB vs GOVTEMB vs IEFMBB vs TIPMBB vs PFFMBB vs VMBSMBB vs SPSB
Where to next
EMB on its own →MBB on its own →Hold both: look the portfolio through →Rankings →EMB dividend history →EMB holdings →MBB dividend history →MBB holdings →Standards and sources →
Sources and dates
EMB and MBB filings on SEC EDGAR ↗
EMB prospectus with the expense ratio (SEC) ↗
iShares page for EMB ↗
MBB prospectus with the expense ratio (SEC) ↗
iShares page for MBB ↗

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, EMB against MBB, data as of Oct 28, 2026. https://etfiq.com/compare/any/emb-vs-mbb

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