
As part of stock mutual fund, domestic stock fund has three main categories such as large cap fund, mid cap fund, and small cap fund. Each category invests in different type of companies. For example, mid cap stock fund invest mainly in medium sized companies. These medium sized companies mean the companies have a market capitalization between $2 billion and $10 billion.
Depending upon the fund’s objective, some mutual funds may invest in other companies’ sizes. The reasons to invest in these mid cap stock mutual funds are: these equity funds have higher growth potential than large cap mutual funds, less coverage from analysts which can provide a surprise upside, and less risky than small cap mutual funds.