In Chinese mainland, there are two stock exchanges, Shanghai and Shenzhen, so stock indexes are also divided into two categories. First, let me tell you what a stock index is. A stock index is an indicator figure compiled by a stock exchange or a financial service institution for reference. \ xd \ xd \ As the stock price fluctuates, investors are bound to face market price risks. It is easy for investors to understand the price changes of a specific stock, but it is neither easy nor annoying to understand the price changes of a variety of stocks one by one. In order to adapt to this situation and need, some financial service institutions make use of their own business knowledge and the advantages of being familiar with the market to compile stock price index. \ xd \ xd \ Stock price index is an indicator to describe the overall price level changes in the stock market. It is to select a representative group of stocks, average their prices by weight, and get them through certain calculation. The specific stock selection and calculation methods of various indexes are different. \xd\xd\ Shanghai Composite Index Series mainly includes the following categories \xd\ Broadly speaking, there are 4 categories and 16 kinds of Shanghai Composite Index, namely \xd\ 1. Shanghai and Shenzhen 3 \xd\ 2. Shanghai 18 \xd\ 3. Shanghai 5 \ 1. Shanghai Composite Index \xd\ 2. New Composite Index \xd\ 3. Seven kinds of classified indexes \xd\ 1.A-share index \xd\ 2.B-share index \xd\ 3. Industrial index \xd\ 4. Business index \xd\ 5. Real estate index \ Iv. Three other indexes \xd\ 1. Fund index \xd\ 2. government bond index \xd\ 3. Corporate bond index \xd\ refers to the Shanghai Composite Index in a narrow sense, and its sample stocks are all listed stocks, including A shares and B shares, which generally reflect the changes in the prices of listed stocks on the Shanghai Stock Exchange, and have been officially implemented since July 15, 1991. \xd\ "Shanghai Stock Exchange Index" is the full name of "Shanghai Stock Exchange Composite Stock Index", also known as "Shanghai Stock Index", which is a statistical index widely used at home and abroad to reflect the overall trend of Shanghai stock market. \xd\ The Shanghai Stock Exchange compiled the Shanghai Stock Exchange and released it on July 15th, 1991. The Shanghai Stock Exchange's withdrawal number is in "points" and the base date is December 19th, 199. The base date is set at 1 points. \ xd \ xd \ SZSE series indexes mainly include: \xd\ (1) comprehensive index: SZSE composite index, SZSE A-share index and SZSE B-share index \xd\ (2) constituent stock indexes: including SZSE component index, component A-share index, component B-share index, industrial index, commercial index, financial index, etc. \xd\ (3) Shenzhen Stock Exchange Fund Index