ACWI vs IOO: holdings overlap, shared companies and scores
As of October 28, 2026, ACWI and IOO overlap 40.0% by weight. iShares MSCI ACWI ETF (ACWI): Large and mid-cap stocks worldwide. iShares Global 100 ETF (IOO): S&P Global 100 index.
Updated October 28, 2026
Where ACWI and IOO trade against their own history
ACWI trades at 20.7 times earnings, against its own median of 18.9, and is more expensive than 63% of its own last 9 years.
IOO trades at 23.3 times earnings, against its own median of 21.0, and is more expensive than 65% of its own last 9 years.
What do ACWI and IOO each hold?
What's inside ACWI: Tech 36%, Magnificent 7 22%.
25% of ACWI is its ten largest holdings.
What's inside IOO: Tech 56%, Magnificent 7 49%.
59% of IOO is its ten largest holdings.
How much do ACWI and IOO overlap? 40.0% by weight
As of October 28, 2026, ACWI and IOO overlap 40.0% by weight.
40% of ACWI is already inside IOO.
100% of IOO is already inside ACWI.
ACWI holds 2,211 companies and IOO holds 113; 111 are in both.
Computed by ETF Copilot from both funds' holdings rather than quoted from a data provider, and rebuilt nightly.
How does ETF Copilot score ACWI and IOO? 6.4 and 7.4 out of 10
As of October 28, 2026, ETF Copilot scores ACWI 6.4 out of 10 and IOO 7.4 out of 10.
They differ most on Quality: ACWI 7.6 and IOO 9.8.
The five factor scores behind them are set out below, 0–10 and higher is better, ranked against every US equity ETF we track.
| Factor | ACWI | IOO |
|---|---|---|
| Growth | 7.3 | 8.4 |
| Value | 3.0 | 2.7 |
| Risk | 6.8 | 6.3 |
| Quality | 7.6 | 9.8 |
| Return | 6.6 | 8.8 |
ACWI is the cheaper of the two at 0.32% a year
As of October 28, 2026, ACWI charges 0.32% a year, yields 1.41% and holds $32.8B in assets across 2211 positions.
As of October 28, 2026, IOO charges 0.40% a year, yields 0.81% and holds $9.3B in assets across 113 positions.
| Measure | ACWI | IOO |
|---|---|---|
| Expense ratio | 0.32% | 0.40% |
| Dividend yield | 1.41% | 0.81% |
| Assets under management | $32.8B | $9.3B |
| Holdings | 2211 | 113 |
Expense ratio, dividend yield and assets under management are reported by the fund and refreshed daily. Every other figure on this page is computed by ETF Copilot.
Compare with similar funds
Cite this
ETF Copilot, “ACWI vs IOO holdings overlap and scores”, as of October 28, 2026.
https://etf-copilot.com/compare/acwi-vs-ioo
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