DIA vs IOO: Differences, Returns & Fees
DIA and IOO hold 32% of their weight in the same names, and IOO returned +21.1% over the year. Net assets: $44.4bn on Oct 8, 2026 for SPDR Dow Jones Industrial Average ETF Trust, and $9.4bn on Oct 9, 2026 for iShares Global 100 ETF.
DIA costs 0.24 points a year less; their one-year returns differ by 8.1 points; DIA is 4.8 times larger.
| DIA | IOO | |
|---|---|---|
| Expense ratio | 0.16% | 0.40% |
| Net assets, as of Oct 8, 2026 | $44.4bn | $9.3bn |
| Total return, 1 year | +13.0% | +21.1% |
| What it tracks | Dow Jones Industrial Average | S&P Global 100 |
| Holdings in common | 32% | |
| Top ten holdings, share of the fund | 55.0% | 59.9% |
| Below its high | 4.6%, high on Aug 5, 2026 | |
Holdings in common uses holdings dated Oct 8, 2026 and Oct 9, 2026.
What they hold in common
By the books each fund has filed, DIA and IOO hold 32% 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 8, 2026 and Oct 9, 2026.
half
32% in common
On the same fields
DIA and IOO on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.
About DIA
DIA tracks the Dow Jones Industrial Average. Over the year to Oct 9, 2026 it returned +13.0% with distributions reinvested. The prospectus expense ratio is 0.16% a year. By its holdings published by its issuer for Oct 8, 2026, 97% of the fund by weight is stocks the S&P 500 also holds, across 30 positions, with the top ten at 55.0%. It sat 4.6% below its high of Aug 5, 2026 on Oct 9, 2026.
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%.
Questions people ask
- Which returned more over the last year, DIA or IOO?
- In the year to Oct 9, 2026, with distributions reinvested, DIA returned +13.0% and IOO +21.1%.
- Which is cheaper, DIA or IOO?
- DIA is cheaper, by 0.24 percentage points a year. That is about $24 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, DIA against IOO, data as of Oct 9, 2026. https://etfiq.com/compare/any/dia-vs-ioo
ETFIQ. (Oct 9, 2026). DIA against IOO. Retrieved from https://etfiq.com/compare/any/dia-vs-ioo
[DIA against IOO (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/any/dia-vs-ioo)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.