Funds can be divided into broad sense and narrow sense. Broadly speaking, a fund refers to a certain amount of funds set up for a certain purpose. It mainly includes trust and investment funds, provident funds, insurance funds, retirement funds and funds of various foundations. People usually refer to funds mainly as securities investment funds. There are three main analysis methods of securities investment: basic analysis, technical analysis and evolution analysis, in which the basic analysis is mainly applied to the value judgment and selection of investment objects, while the technical analysis and evolution analysis are mainly applied to the time and space judgment of specific investment operations as an important supplement to improve the effectiveness and reliability of securities investment analysis. Before buying a fund, investors need to carefully read the prospectus, fund contract, account opening procedures, trading rules and other documents, carefully understand the investment direction, investment strategy, investment objectives, fund manager's performance, account opening conditions, specific trading rules and other important information of the fund, have an overall assessment of the risk and income level of the fund to be purchased, and make investment decisions accordingly. According to the regulations, all fund sales outlets should have the above documents for investors to consult at any time. Investors must open a fund account before buying and selling open-end funds. According to the regulations, the conditions and specific procedures for opening a fund account need to be specified in the relevant sales documents. The above documents will be placed in the fund sales outlets for investors to consult when opening fund accounts. The process of investors buying fund shares during the raising period of open-end funds and before the establishment of funds is called subscription. Usually, the subscription price is the face value of the fund unit (1 yuan) plus certain sales expenses. Investors who subscribe for the fund shall fill in the subscription application form and pay the subscription fee at the fund sales point. The registration authority shall go through the relevant formalities and confirm the subscription.