1. Stock sectors are mainly classified by industry, concept, and region. Among them, industries are divided based on the fields in which listed companies are engaged, such as coal, textiles, medicine, etc.; regions are mainly divided based on provinces; concepts are divided based on weight, hot spots, and featured themes.

2. Stock sector characteristics:

1. The trading volume of individual stocks or the entire sector has increased significantly.

2. The stock price fluctuations have continued to increase, often at the close of the market. Pulling the tail market or hitting the tail market; this phenomenon also occurs at the opening and mid-market.

3. The stock price trend of a certain sector begins to change from weak to strong in conjunction with the increase in turnover rate. When the market falls, individual stocks and sectors do not fall, but the market rises. If a sector rises more than the market, this sector may become a hot spot in the market.