1. The criteria for dividing the stock market into large households, middle households, small households and retail investors are formulated by the securities companies and even the securities business departments themselves. Generally, the total assets in the accounts are the criteria, and sometimes it depends on the trading volume. Large households have large assets or transactions, while middle households, small households and retail investors have small assets. There are usually no strict standards for this, which are generally influenced by the economic level of each region and the on-site conditions of the sales department, and even because the relationship with customers can sometimes be discussed. Take an example for reference: more than 6 million are professional households, more than 6,543.8+0.5 million are large households, more than 800,000 are middle households, about 200,000 are small households, and less than 6,543.8+0.5 million are retail investors.

2. For example, great wisdom has a super-large capital of more than 5 million shares or trades more than 6,543,800 shares, a large capital of less than 5 million shares or trades less than 50,000 shares, a middle-level capital of less than 6,543,800 shares or trades less than 50,000 shares, and a retail capital of less than 2,543,800 shares.

3. According to the number of stocks bought and sold and the amount of investment, investors are divided into large households, middle households and retail investors.

(1) Large investors usually refer to investors who buy and sell stocks in large quantities, with a large amount of investment, which can control the market situation. Large households are mostly composed of large enterprise consortia, trust companies, senior managers of listed companies and groups and individuals with a large amount of funds. Generally speaking, the stock market, which is attended and cared for by large households, has a larger increase when the market is bullish and a smaller decline when the market falls. Large investors refer to large investors with huge funds, such as consortia, trust companies and other groups or individuals. More than 500 thousand can be called a large family, and a large family can enter a large family. If there are tens of millions of large households, securities companies will reduce commissions to attract customers to increase trading volume.

(2) Middle households refer to investors whose financial resources are slightly inferior to those of large households, but whose investments are also large. It should be noted that in practice, some investors have huge investments, but they do not take speculation as their own business. They mainly make profits by holding stocks for a long time. For this kind of investors, we usually include them in the family. Middle households are mostly composed of middle-income individual investors. In the stock market, middle households can't control the market like big households.

(3) Retail investors refer to small investors who buy and sell stocks in small quantities. Retail investors are usually composed of low-income individual investors. Although retail investors are not the main force that affects the changes of the stock market, they are an indispensable part of the stock market because of their large number of investors.