Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IDEV vs MGK: how they differ
IDEV and MGK hold 0% of their weight in the same names, and IDEV returned more over the year.
iShares Core MSCI International Developed Markets ETF and Vanguard Mega Cap Growth Index Fund.
What they hold in common
By the books each fund has filed, IDEV and MGK hold 0% of their money in the same securities at the same weight.
| Only in IDEV | Only in MGK |
|---|---|
| ASML Holding N.V. 1.95% | NVIDIA Corp 13.29% |
| HSBC HOLDINGS PLC 1.09% | Apple Inc 12.19% |
| ASTRAZENECA PLC 1.02% | Microsoft Corp 7.52% |
| Novartis AG 0.97% | Alphabet Inc 5.93% |
| SHELL PLC 0.90% | Alphabet Inc 4.67% |
| Nestle S.A. 0.90% | Amazon.com Inc 4.47% |
| ROYAL BANK OF CANADA 0.87% | Broadcom Inc 4.28% |
| Siemens Aktiengesellschaft 0.78% | Meta Platforms Inc 4.08% |
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.
| IDEV iShares Core MSCI International Developed Markets ETF | MGK Vanguard Mega Cap Growth Index Fund | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Vanguard |
| What it is | Core MSCI International Developed Markets | Mega Cap Growth |
| Total return, 1 year | +18.7% | +14.9% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +1.2 pts | −2.6 pts |
| Expense ratio | 0.04% | 0.07% |
| Already in the S&P 500 | 0.1% | 99.2% |
| Holdings | 2268 | 56 |
IDEV in plain words
IDEV is an index equity fund tracking the Core MSCI International Developed Markets. Over the year to Sep 11, 2026 it returned +18.7% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.04% 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 2268 positions, with the top ten at 10.2%.
MGK in plain words
MGK is an index equity fund tracking the Mega Cap Growth. Over the year to Sep 11, 2026 it returned +14.9% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.07% a year. By its holdings filed for Jun 30, 2026, 99% of the fund by weight is stocks the S&P 500 also holds, across 56 positions, with the top ten at 63.8%.
Questions people ask
- Which returned more over the last year, IDEV or MGK?
- In the year to Sep 12, 2026, with distributions reinvested, IDEV returned +18.7% and MGK returned +14.9%, so IDEV returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IDEV or MGK?
- IDEV charges 0.04% a year and MGK charges 0.07%, so IDEV is cheaper. Fees come from each fund's prospectus.
- How much do IDEV and MGK overlap with the S&P 500?
- By their latest filed holdings, 0% of IDEV and 99% of MGK 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, IDEV against MGK, data as of Sep 12, 2026. https://etfiq.com/compare/any/IDEV-MGK Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources