CGMM vs MDYG: Differences, Returns & Fees
CGMM and MDYG hold 10% of their weight in the same names, and MDYG returned +14.9% over the year. Net assets: $3.5bn on Oct 19, 2026 for Capital Group U.S. Small and Mid Cap ETF, and $2.8bn on Oct 20, 2026 for State Street SPDR S & P 400 Mid Cap Growth ETF.
MDYG costs 0.36 points a year less; their one-year returns differ by 3.8 points; CGMM is 1.3 times larger.
| CGMM | MDYG | |
|---|---|---|
| Expense ratio | 0.51% | 0.15% |
| Net assets, as of Oct 19, 2026 | $3.5bn | $2.8bn |
| Total return, 1 year | +11.1% | +14.9% |
| What it tracks | No index, actively managed | S&P MidCap 400 Growth Index |
| Holdings in common | 10% | |
| Top ten holdings, share of the fund | 18.7% | 13.6% |
| Below its high | 6.8%, high on Aug 13, 2026 | 8.2%, high on Aug 17, 2026 |
Holdings in common uses holdings dated May 31, 2026 and Oct 19, 2026.
What they hold in common
By the books each fund has filed, CGMM and MDYG hold 10% of their money in the same securities at the same weight. Holdings dated May 31, 2026 and Oct 19, 2026.
half
10% in common
On the same fields
CGMM and MDYG on the fields both publish, as of Oct 20, 2026. Source: ETFIQ.
About CGMM
CGMM is actively managed and tracks no index. The prospectus expense ratio is 0.51% a year. By its holdings filed for May 31, 2026, 45% of the fund by weight is stocks the S&P 500 also holds, across 114 positions, with the top ten at 18.7%. It sat 6.8% below its high of Aug 13, 2026 on Oct 20, 2026.
Over the year to Oct 20, 2026 it returned +11.1% with distributions reinvested, against +15.0% for its benchmark, the Russell 3000 Index.
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, CGMM or MDYG?
- In the year to Oct 20, 2026, with distributions reinvested, CGMM returned +11.1% and MDYG +14.9%.
- Which is cheaper, CGMM or MDYG?
- MDYG is cheaper, by 0.36 percentage points a year. That is about $36 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, CGMM against MDYG, data as of Oct 20, 2026. https://etfiq.com/compare/any/cgmm-vs-mdyg
ETFIQ. (Oct 20, 2026). CGMM against MDYG. Retrieved from https://etfiq.com/compare/any/cgmm-vs-mdyg
[CGMM against MDYG (ETFIQ, Oct 20, 2026)](https://etfiq.com/compare/any/cgmm-vs-mdyg)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.