IOO vs MTUM: Differences, Returns & Fees
IOO and MTUM hold 16% of their weight in the same names, and MTUM returned +25.8% over the year. Net assets on Oct 9, 2026: $9.4bn for iShares Global 100 ETF and $20.3bn for iShares MSCI USA Momentum Factor ETF.
MTUM costs 0.25 points a year less; their one-year returns differ by 4.7 points; MTUM is 2.2 times larger.
| IOO | MTUM | |
|---|---|---|
| Expense ratio | 0.40% | 0.15% |
| Net assets | $9.4bn | $20.3bn |
| Total return, 1 year | +21.1% | +25.8% |
| What it tracks | S&P Global 100 | MSCI USA Momentum SR Variant Index |
| Holdings in common | 16% | |
| Top ten holdings, share of the fund | 59.9% | 36.1% |
| Below its high | 7.1%, high on Jun 22, 2026 | |
Holdings in common uses holdings dated Oct 9, 2026.
What they hold in common
By the books each fund has filed, IOO and MTUM hold 16% 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 Oct 9, 2026.
half
16% in common
On the same fields
IOO and MTUM 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 MTUM
MTUM tracks the MSCI USA Momentum Factor. Over the year to Oct 9, 2026 it returned +25.8% with distributions reinvested. The prospectus expense ratio is 0.15% a year. By its holdings published by its issuer for Oct 9, 2026, 93% of the fund by weight is stocks the S&P 500 also holds, across 126 positions, with the top ten at 36.1%. It sat 7.1% below its high of Jun 22, 2026 on Oct 9, 2026.
Questions people ask
- Which returned more over the last year, IOO or MTUM?
- In the year to Oct 9, 2026, with distributions reinvested, IOO returned +21.1% and MTUM +25.8%.
- Which is cheaper, IOO or MTUM?
- MTUM is cheaper, by 0.25 percentage points a year. That is about $25 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 MTUM, data as of Oct 9, 2026. https://etfiq.com/compare/any/ioo-vs-mtum
ETFIQ. (Oct 9, 2026). IOO against MTUM. Retrieved from https://etfiq.com/compare/any/ioo-vs-mtum
[IOO against MTUM (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/any/ioo-vs-mtum)
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