IOO vs VTI: Differences, Returns & Fees
IOO and VTI hold 45% of their weight in the same names, and IOO returned +21.1% over the year. Net assets: $9.4bn on Oct 9, 2026 for iShares Global 100 ETF, and $689.2bn on Sep 30, 2026 for Vanguard Morningstar Total Stock Market ETF.
VTI costs 0.37 points a year less; their one-year returns differ by 4.3 points; VTI is far larger, $689.2bn against $9.2bn.
| IOO | VTI | |
|---|---|---|
| Expense ratio | 0.40% | 0.03% |
| Net assets, as of Sep 30, 2026 | $9.2bn | $689.2bn |
| Total return, 1 year | +21.1% | +16.8% |
| What it tracks | S&P Global 100 | CRSP US Total Market Index |
| Holdings in common | 45% | |
| Top ten holdings, share of the fund | 59.9% | 33.5% |
Holdings in common uses holdings dated Aug 31, 2026 and Oct 9, 2026.
What they hold in common
By the books each fund has filed, IOO and VTI hold 45% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated Aug 31, 2026 and Oct 9, 2026.
half
45% in common
On the same fields
IOO and VTI on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.
About IOO
IOO tracks an index. Over the year to Oct 9, 2026 it returned +21.1% with distributions reinvested. The prospectus expense ratio is 0.40% a year. By its holdings published by its issuer for Oct 9, 2026, 79% of the fund by weight is stocks the S&P 500 also holds, across 104 positions, with the top ten at 59.9%.
About VTI
VTI tracks an index of US total market. Over the year to Oct 9, 2026 it returned +16.8% with distributions reinvested. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer as of Aug 31, 2026, 88% of the fund by weight is stocks the S&P 500 also holds, across 3,509 positions, with the top ten at 33.5%.
Questions people ask
- Which returned more over the last year, IOO or VTI?
- In the year to Oct 9, 2026, with distributions reinvested, IOO returned +21.1% and VTI +16.8%.
- Which is cheaper, IOO or VTI?
- VTI is cheaper, by 0.37 percentage points a year. That is about $37 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.
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ETFIQ, IOO against VTI, data as of Oct 9, 2026. https://etfiq.com/compare/any/ioo-vs-vti
ETFIQ. (Oct 9, 2026). IOO against VTI. Retrieved from https://etfiq.com/compare/any/ioo-vs-vti
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