In mainland China, there are stock exchanges in Shanghai and Shenzhen, so stock indexes are also divided into two categories. Let me first tell you what a stock index is. A stock index is an indicator of stock market changes compiled by a stock exchange or financial service institution.

Indicative numbers for reference.

Since stock prices fluctuate, investors are bound to face market price risk.

It is easy for investors to understand the price changes of a specific stock, but it is not easy or troublesome to understand the price changes of multiple stocks one by one.

In order to adapt to this situation and needs, some financial service institutions use their business knowledge and familiarity with the market to compile stock price indexes. Stock price indexes are indicators that describe changes in the overall price level of the stock market.

It selects a representative group of stocks, performs a weighted average of their prices, and obtains it through certain calculations.

The specific stock selection and calculation methods of various indexes are different.

The SSE series indexes mainly fall into the following categories. Broadly speaking, there are 4 categories and 16 types of SSE indexes, namely 1. 4 sample index categories: 1. CSI 300 2. SSE 180 3. SSE 50 4. Dividend index 2. Comprehensive index

Category 2 types 1. Shanghai Composite Index 2. New Composite Index 3. Category 7 categories 1. A-share index 2. B-share index 3. Industrial index 4. Commercial index 5. Real estate index 6. Utilities index 7. Comprehensive index

4. 3 types of other indexes 1. Fund index 2. Treasury bond index 3. Enterprise bond index In a narrow sense, it specifically refers to the Shanghai Composite Index. Its sample stocks are all listed stocks, including A shares and B shares, which reflect Shanghai as a whole.

The price changes of stocks listed on the stock exchange have been officially released since July 15, 1991.

The full name of "Shanghai Stock Exchange Index" is "Shanghai Stock Exchange Composite Stock Price Index", also known as "Shanghai Stock Index". It is a statistical indicator commonly used at home and abroad to reflect the overall trend of the Shanghai stock market.

The Shanghai Stock Exchange Index was compiled by the Shanghai Stock Exchange and was publicly released on July 15, 1991. The Shanghai Stock Exchange Index is quoted in "points" and the base date is December 19, 1990.

The base day withdrawal is set at 100 points.

The SZSE series indexes mainly include: (1) Composite index: SZSE Composite Index, SZSE A-share index, SZSE B-share index (2) Component index: including SZSE component index, component A-share index, component B-share

Index, industrial index, business index, financial index, real estate index, public utility index, comprehensive enterprise index.