Stock fund is an investment fund with stocks as the investment object, and it is the main type of investment fund. The main function of stock funds is to concentrate the small investments of mass investors into large funds. It mainly invests in different stock portfolios and is the main institutional investor in the stock market.

Small and medium-sized stock funds are investment funds that invest in stocks of small and medium-sized enterprises. Compared with ordinary stock funds, it has higher returns and greater risks.