For investors building their first international allocation, the choice often narrows to two funds that look like twins on the surface: iShares MSCI ACWI ex U.S. ETF (NASDAQ:ACWX | ACWX Price Prediction) and Vanguard FTSE All-World ex-US Index Fund ETF (NYSEARCA:VEU). Both promise the entire investable world minus the United States. Yet they ride on different index families, classify South Korea differently, charge wildly different fees, and have produced a measurable performance gap that compounds over time.
What each fund is actually betting on
ACWX tracks the MSCI ACWI ex USA Index, which captures only large- and mid-capitalization non-U.S. equities. MSCI also classifies South Korea as an emerging market, which tilts the fund’s emerging-markets weight higher.
VEU tracks the FTSE All-World ex US Index, covering stocks of companies located in developed and emerging markets outside of the United States. FTSE classifies South Korea as developed and FTSE’s All-World series reaches further down the cap spectrum, giving VEU thousands more names and a structural small-cap kicker that ACWX simply does not carry.
The implicit bets: ACWX is a cleaner pure-play on emerging Asia through its Korea classification. VEU is a broader, deeper slice of the global market that wins when small caps and Korean developed-market mechanics work in its favor.
Where the difference shows up
Over the past year, VEU returned 33.39% against ACWX’s 32.76%. Stretch the window and the gap widens: 54.80% for VEU versus 52.28% for ACWX over five years, and 159.73% versus 150.28% over ten. The cost differential alone explains a meaningful slice of that drift.
The practical comparison
| Factor | ACWX | VEU |
|---|---|---|
| Expense ratio | 0.32% | 0.04% |
| AUM | Not disclosed | $52.076B |
| Yield | Not disclosed | 2.81% |
| Distributions | Semi-annual | Quarterly |
| Korea classification | Emerging | Developed |
| Cap coverage | Large/mid | Large/mid/small |
| Inception | March 26, 2008 | March 2, 2007 |
VEU’s quarterly cadence smooths reinvestment for income-focused investors. ACWX’s June and December schedule, with a December 2025 distribution of $1.048761, lumps income into two payments.
The verdict
VEU is the cleaner vehicle for the vast majority of investors making a core ex-U.S. allocation. It costs eight times less, includes small caps, pays quarterly, and has quietly outperformed across every multi-year window in the data above. ACWX earns its place only for an investor who specifically wants South Korea categorized as emerging or who needs MSCI-indexed exposure to dovetail with an MSCI-tracking U.S. sleeve. Absent that, the fee gap and breadth advantage point one direction.