MDY vs SPMD: Differences, Returns & Fees
MDY and SPMD hold 99% of their weight in the same names. Net assets on Oct 20, 2026: $25.8bn for SPDR S&P MidCap 400 ETF Trust and $18.4bn for State Street SPDR Portfolio S&P 400 Mid Cap ETF.
SPMD costs 0.20 points a year less; their one-year returns differ by 0.4 points; MDY is 1.4 times larger.
| MDY | SPMD | |
|---|---|---|
| Expense ratio | 0.23% | 0.03% |
| Net assets | $25.8bn | $18.4bn |
| Total return, 1 year | +13.1% | +13.5% |
| What it tracks | S&P MidCap 400 Index | S&P MidCap 400 Index |
| Holdings in common | 99% | |
| Top ten holdings, share of the fund | 7.4% | 7.1% |
| Below its high | 6.7%, high on Aug 14, 2026 | 6.8%, high on Aug 14, 2026 |
Holdings in common uses holdings dated Oct 19, 2026.
MDY and SPMD are built for the same job. How do they differ in cost, holdings and results?
- Cost. MDY charges 0.23% of assets a year and SPMD 0.03%, a gap of 0.20 points.
- What each follows (similar). Both follow S&P MidCap 400 Index.
- Holdings in common (similar). 99% of the weight is in the same securities (holdings dated Oct 19, 2026).
Data as of Oct 20, 2026. The differences are picked by a fixed rule, in a fixed order; the PDF prints it. Page 2 has the returns, overlap, risks and sources.
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What they hold in common
By the books each fund has filed, MDY and SPMD hold 99% of their money in the same securities at the same weight. Holdings dated Oct 19, 2026.
half
99% in common
On the same fields
MDY and SPMD on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About MDY
MDY tracks the S&P MidCap 400. Over the year to Oct 20, 2026 it returned +13.1% with distributions reinvested, against +13.4% for its benchmark, the S&P MidCap 400 Index. The prospectus expense ratio is 0.23% a year. By its holdings published by its issuer for Oct 19, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 401 positions, with the top ten at 7.4%. It sat 6.7% below its high of Aug 14, 2026 on Oct 20, 2026.
About SPMD
SPMD tracks an index. Over the year to Oct 20, 2026 it returned +13.5% with distributions reinvested, against +13.4% for its benchmark, the S&P MidCap 400 Index. The prospectus expense ratio is 0.03% a year. By its holdings published by its issuer for Oct 19, 2026, 0% of the fund by weight is stocks the S&P 500 also holds, across 401 positions, with the top ten at 7.1%. It sat 6.8% below its high of Aug 14, 2026 on Oct 20, 2026.
Questions people ask
- Which returned more over the last year, MDY or SPMD?
- In the year to Oct 20, 2026, with distributions reinvested, MDY returned +13.1% and SPMD +13.5%.
- Which is cheaper, MDY or SPMD?
- SPMD is cheaper, by 0.20 percentage points a year. That is about $20 on $10,000 held for a year. Fees come from each fund's prospectus.
ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
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ETFIQ, MDY against SPMD, data as of Oct 20, 2026. https://etfiq.com/compare/any/mdy-vs-spmd
ETFIQ. (Oct 20, 2026). MDY against SPMD. Retrieved from https://etfiq.com/compare/any/mdy-vs-spmd
[MDY against SPMD (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/mdy-vs-spmd)
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