Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
IYE vs MDY: how they differ
IYE and MDY hold 3% of their weight in the same names, and IYE returned more over the year.
iShares U.S. Energy ETF and SPDR S&P MidCap 400 ETF Trust.
What they hold in common
By the books each fund has filed, IYE and MDY hold 3% of their money in the same securities at the same weight.
| Holding | IYE | MDY |
|---|---|---|
| DT MIDSTREAM, INC. | 0.67% | 0.41% |
| OVINTIV INC. | 0.79% | 0.40% |
| PERMIAN RESOURCES CORPORATION | 0.66% | 0.40% |
| HF SINCLAIR CORPORATION | 0.47% | 0.29% |
| ANTERO RESOURCES CORPORATION | 0.51% | 0.28% |
| RANGE RESOURCES CORPORATION | 0.46% | 0.24% |
| VIPER ENERGY, INC. | 0.41% | 0.23% |
| ANTERO MIDSTREAM CORPORATION | 0.33% | 0.21% |
| NOV INC. | 0.33% | 0.18% |
| CHORD ENERGY CORPORATION | 0.37% | 0.18% |
| MATADOR RESOURCES COMPANY | 0.33% | 0.16% |
| Only in IYE | Only in MDY |
|---|---|
| EXXON MOBIL CORPORATION 21.74% | TWILIO INC 0.86% |
| CHEVRON CORPORATION 15.41% | CARPENTER TECHNOLOGY CORP 0.85% |
| CONOCOPHILLIPS 6.51% | MKS INC 0.83% |
| THE WILLIAMS COMPANIES, INC. 4.38% | CURTISS-WRIGHT CORP 0.77% |
| SLB N.V. 3.95% | ENTEGRIS INC 0.76% |
| EOG RESOURCES, INC. 3.56% | NVENT ELECTRIC PLC 0.76% |
| VALERO ENERGY CORPORATION 3.54% | ATI INC 0.74% |
| MARATHON PETROLEUM CORPORATION 3.44% | ILLUMINA INC 0.73% |
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.
| IYE iShares U.S. Energy ETF | MDY SPDR S&P MidCap 400 ETF Trust | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | iShares | State Street |
| What it is | U.S. Energy | S&P MidCap 400, book from IJH |
| Total return, 1 year | +48.8% | +13.0% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | +31.3 pts | −4.5 pts |
| Expense ratio | 0.37% | 0.23% |
| Already in the S&P 500 | 89.0% | 0.0% |
| Holdings | 38 | 400 |
IYE in plain words
IYE is an index equity fund tracking the U.S. Energy. Over the year to Sep 11, 2026 it returned +48.8% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.37% a year. By its holdings filed for Apr 30, 2026, 89% of the fund by weight is stocks the S&P 500 also holds, across 38 positions, with the top ten at 69.0%.
MDY in plain words
MDY is an index equity fund tracking the S&P MidCap 400. Over the year to Sep 11, 2026 it returned +13.0% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.23% 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 400 positions, with the top ten at 7.7%. 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, IYE or MDY?
- In the year to Sep 12, 2026, with distributions reinvested, IYE returned +48.8% and MDY returned +13.0%, so IYE returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, IYE or MDY?
- IYE charges 0.37% a year and MDY charges 0.23%, so MDY is cheaper. Fees come from each fund's prospectus.
- How much do IYE and MDY overlap with the S&P 500?
- By their latest filed holdings, 89% of IYE and 0% of MDY by weight is stocks the S&P 500 already holds. Between the two funds, 3% 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, IYE against MDY, data as of Sep 12, 2026. https://etfiq.com/compare/any/IYE-MDY Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources