Data as of Oct 28, 2026.

vsCompare their flowsaskIQ about these two fundsAsk the committee about these two funds
Across categories

EDV vs MBB: Differences, Returns & Fees

Share
Share on XDownload as PDF

EDV's duration was 23.3 years on May 31, 2026 and MBB's 5.7 on Aug 31, 2026; MBB charges 0.04% to EDV's 0.05%.

askIQ about this page

askIQ about EDV and MBB

Net assets: $3.6bn on Sep 30, 2026 for Vanguard Extended Duration Treasury ETF, and $35.5bn on Oct 28, 2026 for iShares MBS ETF.

At a glance
−13.3%
EDV total return, 1 year
−0.8%
MBB total return, 1 year
0.05%
EDV expense ratio
0.04%
MBB expense ratio

Pair scorecard

MBB costs 0.01 points a year less; their one-year returns differ by 12.5 points; MBB is 10.1 times larger.

EDV vs MBB: Differences, Returns & Fees
MeasureEDVMBB
Return
Total return, 1 year−13.3%−0.8%
Drawdown
Below its high57.0%, high on Mar 9, 2020
Benchmark
What it tracksBloomberg U.S. Treasury STRIPS 2030 Year Equal Par Bond IndexBloomberg U.S. MBS Index
Cost and size
Expense ratio0.05%0.04%
Net assets, as of Sep 30, 2026$3.6bn$36.2bn
Holdings
Holdings in common0%

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

What they share

0%

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

0 half 100%

half

0% in common

Positions both hold · largest shared weight first EDV MBB
Only in one fund ↓
Only in EDV
STRIPS, due May 15, 2046 1.83%
STRIP PRINC, due May 15, 2046 1.76%
STRIPS, due Aug 15, 2046 1.72%
STRIP PRINC, due Aug 15, 2046 1.70%
STRIPS, due Nov 15, 2046 1.68%
STRIP PRINC, due Aug 15, 2055 1.65%
STRIPS, due Feb 15, 2047 1.60%
STRIP PRINC, due Nov 15, 2055 1.57%
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

EDV Vanguard Extended Duration Treasury ETF MBB iShares MBS ETF
Where it sits Bond ETF Bond ETF
What it is Tracks an index of Extended Duration Treasury Tracks an index of mortgage-backed securities
Total return, 1 year −13.3% −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 0.05% 0.04%
Holdings 81 10813
Net assets, EDV as of Sep 30, 2026 and MBB as of Oct 28, 2026 $3.6bn $35.5bn

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

Alert

MBB flows, by email on Sundays.

One-click unsubscribe. See Privacy.

About each fund
EDV

EDV tracks an index of Extended Duration Treasury. Over the year to Oct 28, 2026 it returned −13.3% with distributions reinvested. The prospectus expense ratio is 0.05% a year. It sat 57.0% below its high of Mar 9, 2020 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, EDV or MBB?
In the year to Oct 28, 2026, with distributions reinvested, EDV returned −13.3% and MBB −0.8%.
Which is cheaper, EDV or MBB?
MBB is cheaper, by 0.01 percentage points a year. That is about $1 on $10,000 held for a year. Fees come from each fund's prospectus.
Other comparisons
Cite this pageCitation, APA and Markdown

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

Open data →

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