Stock trading is to engage in stock trading. The core content of stock trading is to obtain profits through the price difference between buying and selling stocks in the securities market. The rise and fall of stock prices change with the fluctuation of the market. The fluctuation of stock price often shows the characteristics of differentiation, which stems from the concern of funds, and the relationship between them is like the relationship between water and ships. When the water overflows, the ship is high (the stock price rises when the capital flows in), and when the water runs out, the ship is shallow (the stock price falls when the capital flows out).

Fund investment is an indirect way of securities investment. By issuing fund shares, fund management companies concentrate investors' funds, which are managed by fund custodians (that is, qualified banks) and managed and used by fund managers to invest in financial instruments such as stocks and bonds, and then bear the investment risks and share the benefits. Generally speaking, the securities investment fund is an investment tool that collects the funds of many investors and gives them to the bank for safekeeping, and the fund management company is responsible for investing in stocks, bonds and other securities in order to maintain and increase the value.