KOMP vs MDY: Differences, Returns & Fees
KOMP and MDY hold 9% of their weight in the same names, and MDY returned +13.1% over the year. Net assets on Oct 20, 2026: $2.5bn for State Street SPDR S&P Kensho New Economies Composite ETF and $25.8bn for SPDR S&P MidCap 400 ETF Trust.
KOMP costs 0.03 points a year less; their one-year returns differ by 13.9 points; MDY is 10.3 times larger.
| KOMP | MDY | |
|---|---|---|
| Expense ratio | 0.20% | 0.23% |
| Net assets | $2.5bn | $25.8bn |
| Total return, 1 year | −0.8% | +13.1% |
| What it tracks | S&P Kensho New Economies Composite Index | S&P MidCap 400 Index |
| Holdings in common | 9% | |
| Top ten holdings, share of the fund | 10.9% | 7.4% |
| Below its high | 16.1%, high on Jun 2, 2026 | 6.7%, high on Aug 14, 2026 |
Holdings in common uses holdings dated Oct 19, 2026.
KOMP and MDY are built for the same job. How do they differ in cost, holdings and results?
- What each follows. KOMP follows S&P Kensho New Economies Composite Index and MDY follows S&P MidCap 400 Index.
- Holdings in common. 9% of the weight is in the same securities (holdings dated Oct 19, 2026).
- One-year total return. Over 1 year to Oct 20, 2026 KOMP returned −0.8% and MDY +13.1% with distributions reinvested, a gap of 13.9 points.
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, KOMP and MDY hold 9% of their money in the same securities at the same weight. Holdings dated Oct 19, 2026.
half
9% in common
On the same fields
KOMP and MDY on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About KOMP
KOMP tracks an index. Over the year to Oct 20, 2026 it returned −0.8% with distributions reinvested, against +15.9% for its benchmark, the S&P 500 Index. The prospectus expense ratio is 0.20% a year. By its holdings published by its issuer for Oct 19, 2026, 25% of the fund by weight is stocks the S&P 500 also holds, across 503 positions, with the top ten at 10.9%. It sat 16.1% below its high of Jun 2, 2026 on Oct 20, 2026.
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.
Questions people ask
- Which returned more over the last year, KOMP or MDY?
- In the year to Oct 20, 2026, with distributions reinvested, KOMP returned −0.8% and MDY +13.1%.
- Which is cheaper, KOMP or MDY?
- KOMP is cheaper, by 0.03 percentage points a year. That is about $3 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.
Cite this pageCitation, APA and Markdown
ETFIQ, KOMP against MDY, data as of Oct 20, 2026. https://etfiq.com/compare/any/komp-vs-mdy
ETFIQ. (Oct 20, 2026). KOMP against MDY. Retrieved from https://etfiq.com/compare/any/komp-vs-mdy
[KOMP against MDY (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/komp-vs-mdy)
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