This is an actively managed ETF that invests most of its net assets in US small and mid-sized companies within the market capitalization range of the Russell 2500 or Russell Midcap Index. It does not track an index. Instead, it selects stocks with high capital appreciation potential based on research from more than 20 analysts.

It suits investors who want long-term exposure to US small and mid-cap growth companies while also seeking returns beyond those of a passive index.

Launched in 2025 by Capital Group, it is an actively managed ETF.

The fund runs on a multi-manager structure in which more than 20 investment professionals independently recommend stocks, and portfolio managers integrate and coordinate those recommendations. Regardless of index membership, it holds a selected group of about 90 US small and mid-sized companies judged to have high capital appreciation potential, and it aims for a long-term approach with low turnover.

• Multi-manager structure based on collaboration among more than 20 analysts
• Low portfolio turnover to reduce trading costs

Assets under management (AUM) stand at $3.7B, and the Expense Ratio is 0.51% per year.

Its fee is somewhat higher than those of passive ETFs in the same small and mid-cap category, such as IJH, VO, IWR, and MDY, but through active management it aims to outperform the index.

The US small and mid-cap sector tends to show larger swings than large caps, depending on the interest rate environment and economic sensitivity. Small and mid-cap stocks often show relative strength during rate-cut phases, and the benefits also tend to be concentrated during economic expansions.

As interest has grown in Capital Group's brand reliability and its multi-manager structure, inflows have continued since the 2025 launch. AUM is growing quickly, and liquidity conditions are gradually improving as well.

Its multi-manager research capability is its strength, while the higher fee compared with passive funds and the tracking error inherent in active management are the main risks.

In the same US small and mid-cap category, IJH, VO, IWR, and MDY, shown in the table, are passive funds that track the S&P MidCap 400, CRSP Mid Cap, Russell Midcap, and S&P MidCap 400 respectively, with low fees. SPMD is a passive product that tracks the S&P 1500 SmallCap-MidCap index. Direct alternatives comparable to CGMM as an active small and mid-cap strategy include SMMD, an active small and mid-cap ETF, and IWM, a passive product that tracks the Russell 2000.

These are the key points to check before investing in CGMM. Given the nature of active ETFs, it is important to thoroughly review the fee level, the short track record, and small and mid-cap volatility in advance.

The main risks are the high volatility characteristic of small and mid-cap stocks and the possibility of deviation from the benchmark due to active management. Because the fund is at an early stage after launch, judgment must rest on the manager's brand and strategic philosophy until a long-term track record builds up.

It is a suitable choice for investors who want long-term diversified exposure to US small and mid-cap stocks while also seeking returns beyond a passive index. If you want to reduce the fee burden, passive ETFs such as IJH and VO are more advantageous, and if you trust Capital Group's research capability and multi-manager structure, CGMM can be a differentiated alternative.