1, with a total share capital of less than 500 million, is a small-cap stock. Small-cap stocks are listed on the Growth Enterprise Market. Small-cap stocks can be shaken by a private equity fund, so the stock is very lively and the stock price fluctuates greatly. The price-earnings ratio is high.

2. Mid-cap stocks are stocks with a total share capital of 500 million to 654.38+000 billion. Most small and medium-sized stocks are listed on Shenzhen Stock Exchange.

3, the total share capital of more than10 billion shares are large-cap stocks. Most large and medium-sized stocks listed on the Shanghai Stock Exchange. Large-cap stocks mainly involve shipbuilding, steel, petrochemical, banking and other companies. They are the basic stocks with the lowest position (60%) in the fund's public offering. Generally, the stock price fluctuates less and the P/E ratio is lower.