What is a plate? Classification of stock plates, background of plate classification

The so-called plate is a stock with the same or similar industry background. Why should stocks be classified? One is for the needs of statistical analysis. For example, China's Shanghai and Shenzhen stock market classification index divides all stocks in the stock market into five sectors: industry, commerce, real estate, integration and public utilities. The rise and fall of the stock market can only provide the overall level of the stock market, but can not provide a more detailed overview. The second is to analyze the needs of companies in different industries. The rise and fall of a certain kind of stock can not be separated from the change of the company's fundamentals, which is closely related to the development prospects of its industry. It is convenient for everyone to choose stocks according to the industry and then make cross-industry portfolio. The third is the atmosphere created by the main market forces. In order to attract the popularity of the follow-up market, the main force usually raises a certain type of stock, and focuses on individual varieties. Therefore, the plate is also a product carefully cultivated by the main market forces. For the vast number of retail investors, facing thousands of stocks, it is impossible to study them all. If we narrow our attention to a certain sector, and then make a more detailed analysis of the stocks in that sector before making a decision, I am afraid the probability of success is much greater. Usually, all the stocks in the stock market can be divided into different sectors according to different standards. Sometimes, a stock will be divided into multiple sectors because it has two or more characteristics at the same time. At this time, the division of plates is overlapping, that is, the same stock can be divided into different plates according to different standards. Although there are various criteria for plate division, they can basically be summarized into two criteria, namely, the criteria for industry characteristics division and the criteria for market characteristics division.