Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
DFUS vs MDY: how they differ
DFUS and MDY hold 4% of their weight in the same names, and DFUS returned more over the year.
Dimensional U.S. Equity Market ETF and SPDR S&P MidCap 400 ETF Trust.
What they hold in common
By the books each fund has filed, DFUS and MDY hold 4% of their money in the same securities at the same weight.
| Holding | DFUS | MDY |
|---|---|---|
| CURTISS-WRIGHT CORPORATION | 0.04% | 0.77% |
| XPO, INC. | 0.04% | 0.67% |
| MASTEC, INC. | 0.04% | 0.71% |
| UNITED THERAPEUTICS CORPORATION | 0.04% | 0.64% |
| US FOODS HOLDING CORP. | 0.04% | 0.62% |
| TWILIO INC. | 0.03% | 0.86% |
| ATI INC | 0.03% | 0.74% |
| CARPENTER TECHNOLOGY CORPORATION | 0.03% | 0.85% |
| ENTEGRIS, INC. | 0.03% | 0.76% |
| Everpure, Inc | 0.03% | 0.69% |
| WOODWARD, INC. | 0.03% | 0.70% |
| BURLINGTON STORES, INC. | 0.03% | 0.55% |
| Only in DFUS | Only in MDY |
|---|---|
| NVIDIA CORPORATION 6.97% | NVENT ELECTRIC PLC 0.76% |
| APPLE INC. 5.86% | TECHNIPFMC PLC 0.73% |
| MICROSOFT CORPORATION 4.52% | RB GLOBAL INC 0.60% |
| AMAZON.COM, INC. 3.84% | FABRINET 0.56% |
| ALPHABET INC. 3.31% | ANNALY CAPITAL MANAGEMENT INC 0.45% |
| BROADCOM INC. 2.90% | ROIVANT SCIENCES LTD 0.44% |
| ALPHABET INC. 2.74% | W.P. CAREY INC 0.44% |
| META PLATFORMS, INC. 2.01% | JAZZ PHARMACEUTICALS PLC 0.42% |
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.
| DFUS Dimensional U.S. Equity Market ETF | MDY SPDR S&P MidCap 400 ETF Trust | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | Dimensional | State Street |
| What it is | U.S. Equity Market | S&P MidCap 400, book from IJH |
| Total return, 1 year | +17.5% | +13.0% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | 0.0 pts | −4.5 pts |
| Expense ratio | 0.09% | 0.23% |
| Already in the S&P 500 | 90.2% | 0.0% |
| Holdings | 2231 | 400 |
DFUS in plain words
DFUS is an index equity fund tracking the U.S. Equity Market. Over the year to Sep 11, 2026 it returned +17.5% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.09% a year. By its holdings filed for Apr 30, 2026, 90% of the fund by weight is stocks the S&P 500 also holds, across 2231 positions, with the top ten at 35.2%.
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, DFUS or MDY?
- In the year to Sep 12, 2026, with distributions reinvested, DFUS returned +17.5% and MDY returned +13.0%, so DFUS returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, DFUS or MDY?
- DFUS charges 0.09% a year and MDY charges 0.23%, so DFUS is cheaper. Fees come from each fund's prospectus.
- How much do DFUS and MDY overlap with the S&P 500?
- By their latest filed holdings, 90% of DFUS and 0% of MDY by weight is stocks the S&P 500 already holds. Between the two funds, 4% 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, DFUS against MDY, data as of Sep 12, 2026. https://etfiq.com/compare/any/DFUS-MDY Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources