Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
ACWX vs IWM: how they differ
ACWX and IWM hold 0% of their weight in the same names, and ACWX returned more over the year.
iShares MSCI ACWI ex U.S. ETF and iShares Russell 2000 ETF.
What they hold in common
By the books each fund has filed, ACWX and IWM hold 0% of their money in the same securities at the same weight.
| Only in ACWX | Only in IWM |
|---|---|
| Taiwan Semiconductor Manufacturing Compa 4.69% | Moog, Inc. 0.38% |
| ASML Holding N.V. 1.54% | Hut 8 Corp. 0.37% |
| SK hynix Inc. 1.33% | Viasat, Inc. 0.35% |
| Tencent Holdings Limited 1.07% | BrightSpring Health Services, Inc. 0.35% |
| HSBC HOLDINGS PLC 0.86% | Cytokinetics, Inc. 0.35% |
| ASTRAZENECA PLC 0.81% | MaxLinear, Inc. 0.34% |
| Alibaba Group Holding Limited 0.79% | Argan, Inc. 0.34% |
| Novartis AG 0.77% | UMB Financial Corp. 0.33% |
Weight overlap is an ETFIQ calculation: for every security both funds hold, the smaller of the two weights, summed. Above 50%, holding both is close to holding one of them twice. Holdings dated Apr 30, 2026 and Jun 30, 2026.
| ACWX iShares MSCI ACWI ex U.S. ETF | IWM iShares Russell 2000 ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | iShares |
| What it is | MSCI ACWI ex U.S. | Russell 2000 |
| Total return, 1 year | +23.0% | +21.2% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +5.5 pts | +3.7 pts |
| Expense ratio | 0.32% | 0.19% |
| Already in the S&P 500 | 0.0% | 0.0% |
| Holdings | 1759 | 2014 |
ACWX in plain words
ACWX is an index equity fund tracking the MSCI ACWI ex U.S.. Over the year to Sep 11, 2026 it returned +23.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.32% a year. By its holdings filed for Apr 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 1759 positions, with the top ten at 14.6%.
IWM in plain words
IWM is an index equity fund tracking the Russell 2000. Over the year to Sep 11, 2026 it returned +21.2% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.19% a year. By its holdings filed for Jun 30, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 2014 positions, with the top ten at 3.4%. It sat 5.3% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, ACWX or IWM?
- In the year to Sep 12, 2026, with distributions reinvested, ACWX returned +23.0% and IWM returned +21.2%, so ACWX returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, ACWX or IWM?
- ACWX charges 0.32% a year and IWM charges 0.19%, so IWM is cheaper. Fees come from each fund's prospectus.
- How much do ACWX and IWM overlap with the S&P 500?
- By their latest filed holdings, 0% of ACWX and 0% of IWM by weight is stocks the S&P 500 already holds. Between the two funds, 0% of their books are the same securities at the same weight.
Other comparisons
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Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, ACWX against IWM, data as of Sep 12, 2026. https://etfiq.com/compare/any/ACWX-IWM Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources