The reason is:

1, the company makes money by going public, and most of the money will not flow into the stock market; Moreover, the company can also issue shares and additional shares when it goes public. In a year, hundreds of billions of investors' money was swept away;

2. The state should levy taxes and stamp duty; This is indispensable;

3. Brokers should receive commissions to support all employees;

4. Big institutions, bankers and various interest groups should make money.

5. The short-term operation of most investors increases the cost of stock trading.