IVOG vs MDY: Differences, Returns & Fees
IVOG and MDY hold 63% of their weight in the same names, and IVOG returned +15.0% over the year. Net assets: $1.7bn on Sep 30, 2026 for Vanguard S&P Mid-Cap 400 Growth ETF, and $25.8bn on Oct 20, 2026 for SPDR S&P MidCap 400 ETF Trust.
IVOG costs 0.13 points a year less; their one-year returns differ by 1.9 points; MDY is 14.8 times larger.
| IVOG | MDY | |
|---|---|---|
| Expense ratio | 0.10% | 0.23% |
| Net assets, as of Sep 30, 2026 | $1.7bn | $25.2bn |
| Total return, 1 year | +15.0% | +13.1% |
| What it tracks | S&P MidCap 400 Growth Index | S&P MidCap 400 Index |
| Holdings in common | 63% | |
| Top ten holdings, share of the fund | 14.7% | 7.4% |
| Below its high | 8.1%, high on Aug 14, 2026 | 6.7%, high on Aug 14, 2026 |
Holdings in common uses holdings dated Sep 30, 2026 and Oct 19, 2026.
IVOG and MDY are built for the same job. How do they differ in cost, holdings and results?
- What each follows. IVOG follows S&P MidCap 400 Growth Index and MDY follows S&P MidCap 400 Index.
- Cost. IVOG charges 0.10% of assets a year and MDY 0.23%, a gap of 0.13 points.
- Size. IVOG has $1.7bn in net assets and MDY $25.2bn (net assets, as of Sep 30, 2026); MDY is 14.8 times larger.
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, IVOG and MDY hold 63% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 19, 2026.
half
63% in common
On the same fields
IVOG and MDY on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About IVOG
IVOG tracks an index. Over the year to Oct 20, 2026 it returned +15.0% with distributions reinvested, against +14.9% for its benchmark, the S&P MidCap 400 Growth Index. The prospectus expense ratio is 0.10% a year. By its holdings published by its issuer as of Sep 30, 2026, 3% of the fund by weight is stocks the S&P 500 also holds, across 249 positions, with the top ten at 14.7%. It sat 8.1% below its high of Aug 14, 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, IVOG or MDY?
- In the year to Oct 20, 2026, with distributions reinvested, IVOG returned +15.0% and MDY +13.1%.
- Which is cheaper, IVOG or MDY?
- IVOG is cheaper, by 0.13 percentage points a year. That is about $13 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, IVOG against MDY, data as of Oct 20, 2026. https://etfiq.com/compare/any/ivog-vs-mdy
ETFIQ. (Oct 20, 2026). IVOG against MDY. Retrieved from https://etfiq.com/compare/any/ivog-vs-mdy
[IVOG against MDY (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/ivog-vs-mdy)
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