Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IDEV vs RSP: how they differ
IDEV and RSP hold 0% of their weight in the same names, and IDEV returned more over the year.
iShares Core MSCI International Developed Markets ETF and Invesco S&P 500 Equal Weight ETF.
What they hold in common
By the books each fund has filed, IDEV and RSP hold 0% of their money in the same securities at the same weight.
| Only in IDEV | Only in RSP |
|---|---|
| ASML Holding N.V. 1.95% | Intel Corp. 0.38% |
| HSBC HOLDINGS PLC 1.09% | Seagate Technology Holdings PLC 0.34% |
| ASTRAZENECA PLC 1.02% | Advanced Micro Devices, Inc. 0.33% |
| Novartis AG 0.97% | ON Semiconductor Corp. 0.33% |
| SHELL PLC 0.90% | Sandisk Corp. 0.32% |
| Nestle S.A. 0.90% | Western Digital Corp. 0.31% |
| ROYAL BANK OF CANADA 0.87% | Ciena Corp. 0.30% |
| Siemens Aktiengesellschaft 0.78% | Monolithic Power Systems, Inc. 0.29% |
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.
| IDEV iShares Core MSCI International Developed Markets ETF | RSP Invesco S&P 500 Equal Weight ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | Invesco |
| What it is | Core MSCI International Developed Markets | S&P 500 equal weight |
| Total return, 1 year | +18.7% | +14.8% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +1.2 pts | −2.7 pts |
| Expense ratio | 0.04% | 0.20% |
| Already in the S&P 500 | 0.1% | 99.1% |
| Holdings | 2268 | 503 |
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%.
RSP in plain words
RSP is an index equity fund tracking the S&P 500 equal weight. Over the year to Sep 11, 2026 it returned +14.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.20% a year. By its holdings filed for Apr 30, 2026, 99% of the fund by weight is stocks the S&P 500 also holds, across 503 positions, with the top ten at 3.2%. It sat 3.5% below its high of Aug 14, 2026 on Sep 11, 2026.
Questions people ask
- Which returned more over the last year, IDEV or RSP?
- In the year to Sep 12, 2026, with distributions reinvested, IDEV returned +18.7% and RSP returned +14.8%, so IDEV returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IDEV or RSP?
- IDEV charges 0.04% a year and RSP charges 0.20%, so IDEV is cheaper. Fees come from each fund's prospectus.
- How much do IDEV and RSP overlap with the S&P 500?
- By their latest filed holdings, 0% of IDEV and 99% of RSP 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.
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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 RSP, data as of Sep 12, 2026. https://etfiq.com/compare/any/IDEV-RSP Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources