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Data as of Oct 28, 2026.

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IDEV vs VO: Differences, Returns & Fees

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Over the year to Oct 28, 2026, IDEV returned +13.4% to VO's +12.8%; 2% of their weight is in the same names.

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Net assets: $34.0bn on Oct 28, 2026 for iShares Core MSCI International Developed Markets ETF, and $103.4bn on Sep 30, 2026 for Vanguard Morningstar Mid-Cap ETF.

IDEV on its own →VO on its own →
At a glance
+13.4%
IDEV total return, 1 year
+12.8%
VO total return, 1 year
0.04%
IDEV expense ratio
0.03%
VO expense ratio

Pair scorecard

VO costs 0.01 points a year less; their one-year returns differ by 0.6 points; VO is 3.2 times larger.

IDEV vs VO: Differences, Returns & Fees
MeasureIDEVVO
Return
Total return, 1 year+13.4%+12.8%
Drawdown
Below its high4.4%, high on Aug 25, 20263.1%, high on Aug 14, 2026
Benchmark
What it tracksMSCI World ex USA Investable Market IndexMorningstar US Mid Cap Index (formerly CRSP US Mid Cap Index)
Cost and size
Expense ratio0.04%0.03%
Net assets, as of Sep 30, 2026$32.2bn$103.4bn
Holdings
Holdings in common2%
Top ten holdings, share of the fund10.9%9.7%

Holdings in common uses holdings dated Sep 30, 2026 and Oct 27, 2026. Method

What they share

2%

By the books each fund has filed, IDEV and VO hold 2% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 27, 2026.

0 half 100%

half

2% in common

Positions both hold · largest shared weight first IDEV VO
ROCHE PS PAR AG 1.18% 0.34%
DEUTSCHE TELEKOM N AG 0.33% 0.25%
ESSILORLUXOTTICA SA 0.21% 0.23%
VINCI SA 0.20% 0.26%
RECKITT BENCKISER GROUP PLC 0.15% 0.22%
LOBLAW COMPANIES LTD 0.10% 0.17%
PEMBINA PIPELINE 0.10% 0.23%
PRUDENTIAL PLC 0.10% 0.39%
ARISTOCRAT LEISURE 0.09% 0.55%
HEIDELBERG MATERIALS AG 0.08% 0.12%
HELVETIA BALOISE HOLDING N AG 0.08% 0.30%
EQT 0.05% 0.15%
Only in one fund ↓
Only in IDEV
ASML HOLDING 2.23%
SHELL 1.06%
HSBC HOLDINGS PLC 1.03%
NOVARTIS AG 1.00%
ROYAL BANK OF CANADA 0.98%
ASTRAZENECA PLC 0.90%
NESTLE SA 0.90%
SAP 0.85%
Only in VO
Cloudflare Inc 1.11%
Valero Energy Corp 1.10%
Marathon Petroleum Corp 1.10%
Phillips 66 1.01%
Quanta Services Inc 0.95%
Vertiv Holdings Co 0.92%
Datadog Inc 0.91%
Howmet Aerospace Inc 0.89%
Check overlap with more funds →

Side by side

IDEV iShares Core MSCI International Developed Markets ETF VO Vanguard Morningstar Mid-Cap ETF
Where it sits Stock ETF Stock ETF
Issuer iShares Vanguard
What it is Tracks the MSCI International Developed Markets Tracks an index of Mid-Cap
Total return, 1 year +13.4% +12.8%
Its benchmark over the same days +14.3% (ACWX) not measured
Gap to its benchmark −0.9 pts vs ACWX not measured
Expense ratio 0.04% 0.03%
Already in the S&P 500 0.0% 91.1%
Holdings 2317 273
Net assets, IDEV as of Oct 28, 2026 and VO as of Sep 30, 2026 $34.0bn $103.4bn

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

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About each fund
IDEV

IDEV tracks the MSCI International Developed Markets. Over the year to Oct 28, 2026 it returned +13.4% with distributions reinvested, against +14.3% for its benchmark, the MSCI ACWI ex USA Index. The prospectus expense ratio is 0.04% a year. By its holdings published by its issuer for Oct 27, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 2,317 positions, with the top ten at 10.9%. It sat 4.4% below its high of Aug 25, 2026 on Oct 28, 2026.

VO

VO tracks an index of Mid-Cap. Over the year to Oct 28, 2026 it returned +12.8% with distributions reinvested. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Sep 30, 2026, 91% of the fund by weight is stocks the S&P 500 also holds, across 273 positions, with the top ten at 9.7%. It sat 3.1% below its high of Aug 14, 2026 on Oct 28, 2026.

Questions people ask

Which returned more over the last year, IDEV or VO?
In the year to Oct 28, 2026, with distributions reinvested, IDEV returned +13.4% and VO +12.8%.
Which is cheaper, IDEV or VO?
VO 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.
How much do IDEV and VO overlap with the S&P 500?
By their latest filed holdings, 0% of IDEV and 91% of VO by weight is stocks the S&P 500 already holds.
Other comparisons
IDEV vs IJHIDEV vs MDYIDEV vs MOATIDEV vs VXFIXUS vs VOVEU vs VOSCHF vs VOVO vs VXUS
Where to next
IDEV on its own →VO on its own →Hold both: look the portfolio through →Rankings →IDEV dividend history →IDEV holdings →VO dividend history →VO holdings →Standards and sources →
Sources and dates
IDEV filings on SEC EDGAR ↗
IDEV prospectus with the expense ratio (SEC) ↗
iShares page for IDEV ↗
VO filings on SEC EDGAR ↗
VO prospectus with the expense ratio (SEC) ↗
Vanguard page for VO ↗

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.

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ETFIQ, IDEV against VO, data as of Oct 28, 2026. https://etfiq.com/compare/any/idev-vs-vo

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