MDY vs TMSL: Differences, Returns & Fees
MDY and TMSL hold 33% of their weight in the same names, and TMSL returned +16.9% over the year. Net assets on Oct 20, 2026: $25.8bn for SPDR S&P MidCap 400 ETF Trust and $3.1bn for T. Rowe Price Small-Mid Cap ETF.
MDY costs 0.32 points a year less; their one-year returns differ by 3.8 points; MDY is 8.3 times larger.
| MDY | TMSL | |
|---|---|---|
| Expense ratio | 0.23% | 0.55% |
| Net assets | $25.8bn | $3.1bn |
| Total return, 1 year | +13.1% | +16.9% |
| What it tracks | S&P MidCap 400 Index | No index, actively managed |
| Holdings in common | 33% | |
| Top ten holdings, share of the fund | 7.4% | 9.8% |
| Below its high | 6.7%, high on Aug 14, 2026 | 8.3%, high on Aug 14, 2026 |
Holdings in common uses holdings dated Jun 30, 2026 and Oct 19, 2026.
What they hold in common
By the books each fund has filed, MDY and TMSL hold 33% of their money in the same securities at the same weight. Holdings dated Jun 30, 2026 and Oct 19, 2026.
half
33% in common
On the same fields
MDY and TMSL 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 TMSL
TMSL is actively managed and tracks no index. The prospectus expense ratio is 0.55% a year. By its holdings filed for Jun 30, 2026, 15% of the fund by weight is stocks the S&P 500 also holds, across 297 positions, with the top ten at 9.8%. It sat 8.3% below its high of Aug 14, 2026 on Oct 20, 2026.
Over the year to Oct 20, 2026 it returned +16.9% with distributions reinvested, against +15.0% for its benchmark, the Russell 3000 Index.
Questions people ask
- Which returned more over the last year, MDY or TMSL?
- In the year to Oct 20, 2026, with distributions reinvested, MDY returned +13.1% and TMSL +16.9%.
- Which is cheaper, MDY or TMSL?
- MDY is cheaper, by 0.32 percentage points a year. That is about $32 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 TMSL, data as of Oct 20, 2026. https://etfiq.com/compare/any/mdy-vs-tmsl
ETFIQ. (Oct 20, 2026). MDY against TMSL. Retrieved from https://etfiq.com/compare/any/mdy-vs-tmsl
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