What was a stock? What were the conditions for trading?

A stock was a type of security that represented a portion of all the equity in a company. Becoming a shareholder of the company when buying shares gives you a potential share of the company's future profits. Trading stocks referred to buying and selling stocks in the stock market to obtain capital gains or dividends. The conditions required for stock trading included: 1. Capital: You need enough capital to invest in stocks. If you don't have enough capital, you can't invest in stocks. 2. Knowledge: To invest in stocks, you need to have certain financial knowledge and market knowledge to understand the basic knowledge and investment skills of stocks in order to make the right investment decisions. 3. Time: You need enough time to observe the market and the company and make investment decisions. 4. Awareness of risk: There are risks in stock trading. You need to understand the investment risks and master the methods and techniques of risk control in order to remain calm and rational when the market fluctuates. 5. Certificate and tools: To invest in stocks, you need to hold the corresponding documents such as ID card, business license, etc., as well as use the corresponding investment tools such as stock accounts and trading systems.