IVOO vs MDYG: Differences, Returns & Fees
IVOO and MDYG hold 64% of their weight in the same names, and MDYG returned +14.9% over the year. Net assets: $3.7bn on Sep 30, 2026 for Vanguard S&P Mid-Cap 400 ETF, and $2.8bn on Oct 20, 2026 for State Street SPDR S & P 400 Mid Cap Growth ETF.
IVOO costs 0.08 points a year less; their one-year returns differ by 1.3 points; IVOO is 1.3 times larger.
| IVOO | MDYG | |
|---|---|---|
| Expense ratio | 0.07% | 0.15% |
| Net assets, as of Sep 30, 2026 | $3.7bn | $2.8bn |
| Total return, 1 year | +13.6% | +14.9% |
| What it tracks | S&P MidCap 400 Index | S&P MidCap 400 Growth Index |
| Holdings in common | 64% | |
| Top ten holdings, share of the fund | 7.8% | 13.6% |
| Below its high | 6.7%, high on Aug 14, 2026 | 8.2%, high on Aug 17, 2026 |
Holdings in common uses holdings dated Sep 30, 2026 and Oct 19, 2026.
IVOO and MDYG are built for the same job. How do they differ in cost, holdings and results?
- What each follows. IVOO follows S&P MidCap 400 Index and MDYG follows S&P MidCap 400 Growth Index.
- Holdings in common (similar). 64% of the weight is in the same securities (holdings dated Sep 30, 2026 and Oct 19, 2026).
- One-year total return (similar). Over 1 year to Oct 20, 2026 IVOO returned +13.6% and MDYG +14.9% with distributions reinvested, a gap of 1.3 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, IVOO and MDYG hold 64% of their money in the same securities at the same weight. Holdings dated Sep 30, 2026 and Oct 19, 2026.
half
64% in common
On the same fields
IVOO and MDYG on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About IVOO
IVOO tracks an index. Over the year to Oct 20, 2026 it returned +13.6% with distributions reinvested, against +13.4% for its benchmark, the S&P MidCap 400 Index. The prospectus expense ratio is 0.07% a year. By its holdings published by its issuer as of Sep 30, 2026, 2% of the fund by weight is stocks the S&P 500 also holds, across 402 positions, with the top ten at 7.8%. It sat 6.7% below its high of Aug 14, 2026 on Oct 20, 2026.
About MDYG
MDYG tracks an index. Over the year to Oct 20, 2026 it returned +14.9% with distributions reinvested, against +14.9% for its benchmark, the S&P MidCap 400 Growth Index. The prospectus expense ratio is 0.15% 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 247 positions, with the top ten at 13.6%. It sat 8.2% below its high of Aug 17, 2026 on Oct 20, 2026.
Questions people ask
- Which returned more over the last year, IVOO or MDYG?
- In the year to Oct 20, 2026, with distributions reinvested, IVOO returned +13.6% and MDYG +14.9%.
- Which is cheaper, IVOO or MDYG?
- IVOO is cheaper, by 0.08 percentage points a year. That is about $8 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, IVOO against MDYG, data as of Oct 20, 2026. https://etfiq.com/compare/any/ivoo-vs-mdyg
ETFIQ. (Oct 20, 2026). IVOO against MDYG. Retrieved from https://etfiq.com/compare/any/ivoo-vs-mdyg
[IVOO against MDYG (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/ivoo-vs-mdyg)
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