IVOO vs VO: Differences, Returns & Fees
IVOO and VO hold 0% of their weight in the same names, and IVOO returned +13.6% over the year. Net assets on Sep 30, 2026: $3.7bn for Vanguard S&P Mid-Cap 400 ETF and $103.4bn for Vanguard Morningstar Mid-Cap ETF.
VO costs 0.04 points a year less; their one-year returns differ by 1.2 points; VO is far larger, $103.4bn against $3.7bn.
| IVOO | VO | |
|---|---|---|
| Expense ratio | 0.07% | 0.03% |
| Net assets, as of Sep 30, 2026 | $3.7bn | $103.4bn |
| Total return, 1 year | +13.6% | +12.4% |
| What it tracks | S&P MidCap 400 Index | Morningstar US Mid Cap Index (formerly CRSP US Mid Cap Index) |
| Holdings in common | 0% | |
| Top ten holdings, share of the fund | 7.8% | 9.7% |
| Below its high | 6.7%, high on Aug 14, 2026 | 3.8%, high on Aug 14, 2026 |
Holdings in common uses holdings dated Sep 30, 2026.
IVOO and VO are built for the same job. How do they differ in cost, holdings and results?
- What each follows. IVOO follows S&P MidCap 400 Index and VO follows Morningstar US Mid Cap Index (formerly CRSP US Mid Cap Index).
- Holdings in common. 0% of the weight is in the same securities (holdings dated Sep 30, 2026).
- Size. IVOO has $3.7bn in net assets and VO $103.4bn (net assets, as of Sep 30, 2026); VO is 27.9 times larger.
Data as of Oct 20, 2026. The differences are picked by a fixed rule, in a fixed order; the PDF prints it. Page 2 has the returns, overlap, risks and sources.
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What they hold in common
By the books each fund has filed, IVOO and VO hold 0% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026.
half
0% in common
On the same fields
IVOO and VO on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About IVOO
IVOO tracks an index. Over the year to Oct 20, 2026 it returned +13.6% with distributions reinvested, against +13.4% for its benchmark, the S&P MidCap 400 Index. The prospectus expense ratio is 0.07% a year. By its holdings published by its issuer as of Sep 30, 2026, 2% of the fund by weight is stocks the S&P 500 also holds, across 402 positions, with the top ten at 7.8%. It sat 6.7% below its high of Aug 14, 2026 on Oct 20, 2026.
About VO
VO tracks an index of Mid-Cap. Over the year to Oct 20, 2026 it returned +12.4% 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 3.8% below its high of Aug 14, 2026 on Oct 20, 2026.
Questions people ask
- Which returned more over the last year, IVOO or VO?
- In the year to Oct 20, 2026, with distributions reinvested, IVOO returned +13.6% and VO +12.4%.
- Which is cheaper, IVOO or VO?
- VO is cheaper, by 0.04 percentage points a year. That is about $4 on $10,000 held for a year. Fees come from each fund's prospectus.
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, IVOO against VO, data as of Oct 20, 2026. https://etfiq.com/compare/any/ivoo-vs-vo
ETFIQ. (Oct 20, 2026). IVOO against VO. Retrieved from https://etfiq.com/compare/any/ivoo-vs-vo
[IVOO against VO (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/ivoo-vs-vo)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.