A: Index funds refer to funds associated with the performance of the stock market index. Money market fund means that the net asset value per share is $ 1, and the option of writing a check is provided. Dollar-balanced funds refer to securities with a certain proportion of stocks and fixed income at the same time. Equity funds are mainly composed of stocks, but there are also some fixed income or other types of securities. Asset allocation fund refers to securities with both equity and fixed income, but the holding ratio can be adjusted according to different market conditions. Special industry fund refers to holding securities of companies in specific industries or departments. Bond funds refer to securities that mainly hold fixed income. Life cycle fund is a balanced fund, and the portfolio of securities depends on the age of investors.