Data as of Sep 12, 2026. Both funds on the fields they both publish, from the same sources.
MDY vs ONEQ: how they differ
MDY and ONEQ hold 3% of their weight in the same names, and ONEQ returned more over the year.
SPDR S&P MidCap 400 ETF Trust and Fidelity Nasdaq Composite Index ETF.
What they hold in common
By the books each fund has filed, MDY and ONEQ hold 3% of their money in the same securities at the same weight.
| Holding | MDY | ONEQ |
|---|---|---|
| STERLING INFRASTRUCTURE INC | 0.71% | 0.06% |
| MACOM TECHNOLOGY SOLUTIONS HOLDINGS INC | 0.69% | 0.06% |
| ILLUMINA INC | 0.73% | 0.05% |
| NEXTPOWER INC | 0.49% | 0.05% |
| UNITED THERAPEUTICS CORP | 0.64% | 0.05% |
| ENTEGRIS INC | 0.76% | 0.05% |
| OKTA INC | 0.63% | 0.04% |
| MKS INC | 0.83% | 0.04% |
| LATTICE SEMICONDUCTOR CORP | 0.58% | 0.04% |
| WOODWARD INC | 0.70% | 0.04% |
| ROYAL GOLD INC | 0.45% | 0.04% |
| TTM TECHNOLOGIES INC | 0.54% | 0.04% |
| Only in MDY | Only in ONEQ |
|---|---|
| TWILIO INC 0.86% | NVIDIA CORP 11.24% |
| CARPENTER TECHNOLOGY CORP 0.85% | APPLE INC 10.04% |
| CURTISS-WRIGHT CORP 0.77% | MICROSOFT CORP 7.32% |
| NVENT ELECTRIC PLC 0.76% | AMAZON.COM INC 6.37% |
| ATI INC 0.74% | ALPHABET INC 4.85% |
| TECHNIPFMC PLC 0.73% | BROADCOM INC 4.64% |
| MASTEC INC 0.71% | ALPHABET INC 4.48% |
| EVERPURE INC 0.69% | TESLA INC 3.58% |
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 Jun 30, 2026 and May 31, 2026.
| MDY SPDR S&P MidCap 400 ETF Trust | ONEQ Fidelity Nasdaq Composite Index ETF | |
|---|---|---|
| Where it sits | Core index fund | Core index fund |
| Issuer | State Street | Fidelity |
| What it is | S&P MidCap 400, book from IJH | Nasdaq Composite |
| Total return, 1 year | +13.0% | +20.6% |
| S&P 500 over the same days | +17.5% | +17.5% |
| Gap to the S&P 500 | −4.5 pts | +3.1 pts |
| Expense ratio | 0.23% | 0.21% |
| Already in the S&P 500 | 0.0% | 87.4% |
| Holdings | 400 | 1022 |
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.
ONEQ in plain words
ONEQ is an index equity fund tracking the Nasdaq Composite. Over the year to Sep 11, 2026 it returned +20.6% with distributions reinvested, against +17.5% for the S&P 500 and +23.0% for the Nasdaq-100. The prospectus expense ratio is 0.21% a year. By its holdings filed for May 31, 2026, 87% of the fund by weight is stocks the S&P 500 also holds, across 1022 positions, with the top ten at 57.9%.
Questions people ask
- Which returned more over the last year, MDY or ONEQ?
- In the year to Sep 12, 2026, with distributions reinvested, MDY returned +13.0% and ONEQ returned +20.6%, so ONEQ returned more. One year is one year; the longer windows are in the table.
- Which is cheaper, MDY or ONEQ?
- MDY charges 0.23% a year and ONEQ charges 0.21%, so ONEQ is cheaper. Fees come from each fund's prospectus.
- How much do MDY and ONEQ overlap with the S&P 500?
- By their latest filed holdings, 0% of MDY and 87% of ONEQ 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, MDY against ONEQ, data as of Sep 12, 2026. https://etfiq.com/compare/any/MDY-ONEQ Free to use with attribution; the underlying files are at Open data.
A comparison is not a recommendation. Standards and sources