Data as of Sep 13, 2026. Both funds on the fields they both publish, from the same sources.
ACWX vs IBB: how they differ
ACWX and IBB hold 0% of their weight in the same names, and IBB returned more over the year.
iShares MSCI ACWI ex U.S. ETF and iShares Biotechnology ETF.
What they hold in common
By the books each fund has filed, ACWX and IBB hold 0% of their money in the same securities at the same weight.
| Holding | ACWX | IBB |
|---|---|---|
| ARGENX | 0.17% | 3.78% |
| BLK CSH FND TREASURY SL AGENCY | 0.11% | 0.12% |
| GENMAB | 0.05% | 1.25% |
| ABIVAX SA | 0.02% | 0.55% |
| ERSTE GROUP BANK AG | 0.12% | 0.02% |
| Only in ACWX | Only in IBB |
|---|---|
| TAIWAN SEMICONDUCTOR MANUFACTURING 5.09% | VERTEX PHARMACEUTICALS 7.94% |
| SAMSUNG ELECTRONICS LTD 2.50% | AMGEN INC 7.85% |
| SK HYNIX 2.04% | GILEAD SCIENCES 7.44% |
| ASML HOLDING 1.77% | REGENERON PHARMACEUTICALS 5.92% |
| HSBC HOLDINGS PLC 0.94% | MODERNA 3.67% |
| TENCENT HOLDINGS 0.88% | NATERA 3.30% |
| ROCHE PS PAR AG 0.79% | REVOLUTION MEDICINES 2.87% |
| ROYAL BANK OF CANADA 0.76% | ALNYLAM PHARMACEUTICALS 2.44% |
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 Sep 10, 2026.
| ACWX iShares MSCI ACWI ex U.S. ETF | IBB iShares Biotechnology ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | iShares |
| What it is | MSCI ACWI ex U.S. | Biotechnology |
| Total return, 1 year | +23.0% | +41.5% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +5.5 pts | +24.0 pts |
| Expense ratio | 0.32% | 0.44% |
| Already in the S&P 500 | 0.0% | 35.6% |
| Holdings | 1515 | 233 |
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 Sep 10, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 1515 positions, with the top ten at 16.1%.
IBB in plain words
IBB is an index equity fund tracking the Biotechnology. Over the year to Sep 11, 2026 it returned +41.5% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.44% a year. By its holdings filed for Sep 10, 2026, 36% of the fund by weight is stocks the S&P 500 also holds, across 233 positions, with the top ten at 47.5%. It sat 6.5% below its high of Aug 19, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, ACWX or IBB?
- In the year to Sep 13, 2026, with distributions reinvested, ACWX returned +23.0% and IBB returned +41.5%, so IBB returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, ACWX or IBB?
- ACWX charges 0.32% a year and IBB charges 0.44%, so ACWX is cheaper. Fees come from each fund's prospectus.
- How much do ACWX and IBB overlap with the S&P 500?
- By their latest filed holdings, 0% of ACWX and 36% of IBB 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
Where to next
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 IBB, data as of Sep 13, 2026. https://etfiq.com/compare/any/acwx-vs-ibb Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources