The stock price index is the stock index. It is a reference index compiled by stock exchanges or financial services institutions to indicate changes in the stock market.

The main stock price indices in China include:

1. China Securities Index Co., Ltd. and its index. Established on August 25th, 2005, CSI Index Co., Ltd. is a company jointly funded by Shanghai Stock Exchange and Shenzhen Stock Exchange, specializing in the development and service of securities indexes and index derivatives.

(1) Shanghai and Shenzhen 300 Index. The Shanghai and Shenzhen 300 Index is an index jointly released by the Shanghai and Shenzhen Stock Exchanges on April 8, 2005, which reflects the overall trend of the A-share market. The purpose of compiling the CSI 300 Index is to reflect the overall situation and operation of stock price changes in China stock market, which can be used as an evaluation standard of investment performance and provide basic conditions for indexed investment and innovation of index derivatives. After the establishment of CSI Index Co., Ltd., the Shanghai and Shenzhen Stock Exchanges handed over the management and related rights and interests of CSI 300 Index to CSI Index Co., Ltd. ..

The Shanghai and Shenzhen 300 Index is referred to as "Shanghai and Shenzhen 300" for short, and the number of constituent stocks is 300. The benchmark date of the index is 65438+February 3, 20041,and the base point is 100.

(2) CSI scale index. CSI scale index includes CSI 100 index, CSI 200 index, CSI 500 index, CSI 700 index, CSI 800 index and CSI circulation index. Together with the CSI 300 Index, these indexes constitute the CSI scale index system. Among them, the CSI 100 index is positioned in the large-cap index, the CSI 200 index is the medium-cap index, the CSI 300 index is the large-cap index, the CSI 500 index is the small-cap index, the CSI 700 index is the small-cap index, and the CSI 800 index consists of large, medium and small-cap indexes. The calculation method, correction method and adjustment method of CSI scale index are the same as those of CSI 300 Index.

2. Stock index of Shanghai Stock Exchange. Shanghai Stock Exchange has compiled and published a series of Shanghai index, including Shanghai index 180, Shanghai index 50, A-share index, B-share index, sub-index, bond index and fund index, among which the Shanghai index was compiled the earliest.

(1) component index class.

① Shanghai Composite Index. The constituent stock index of Shanghai Stock Exchange, referred to as SSE 180 index for short, is an index generated by the Shanghai Stock Exchange's adjustment and renaming of the original SSE 30 index.

There are 180 sample stocks in the constituent stock index of Shanghai Stock Exchange. The criteria for selecting samples are to follow three indicators: scale (total market value and circulating market value), liquidity (transaction amount and turnover rate) and industry, that is, to select stocks and industries with large scale and good liquidity as samples and establish a benchmark that reflects the overall situation of Shanghai securities market and can be used as the basis for investment evaluation and financial derivatives. According to the principle of sample stability and dynamic tracking, the constituent stocks of Shanghai Stock Exchange are adjusted once a year, and the proportion of each adjustment is generally not more than 10%. Under special circumstances, sample stocks may be temporarily adjusted.

② SSE 50 Index. On October 2nd, 2004, the Shanghai Stock Exchange released the SSE 50 Index. The SSE 50 Index comprehensively ranks the stocks according to the circulating market value and transaction amount, and selects 50 stocks with the largest scale and good liquidity in Shanghai from the sample of SSE 180 Index to form sample stocks, which fully reflects the overall situation of the most influential leading enterprises in Shanghai.

③ SSE 380 Index. Shanghai Stock Exchange and China Securities Index Co., Ltd. released the SSE 380 Index on1October 29th, 20 1065438. ? The selection of sample stocks of SSE 380 Index mainly considers the company size, profitability, growth, liquidity and the representativeness of emerging industries, focusing on the market performance of small and medium-sized stocks listed on SSE.

(2) Comprehensive index class.

① Shanghai Composite Index. Shanghai Stock Exchange has compiled and published the stock index of Shanghai Stock Exchange since1991July 15. It takes 19901February19 as the base period, takes all listed stocks as samples, takes stock issuance as the maximum weight, and adopts the weighted average method to calculate.

② New Shanghai Composite Index. The new Shanghai Composite Index was first released on June 4th, 2006 with the index code of 0000 17. The new comprehensive index selects the listed companies in Shanghai stock market that have completed the share-trading reform as samples, and the stocks that have implemented the share-trading reform are included in the index on the second trading day after the implementation of the plan. The new comprehensive index is a whole market index, which includes not only the market value of A shares, but also the market value of B shares of companies with B shares.

The Shanghai Composite Index series also includes A-share index, B-share index, industrial index, commercial index, real estate index, public utility index, comprehensive index, medium-sized comprehensive index, Shanghai Stock Exchange circulation index and so on.

According to the main business scope, investment direction and output of all listed companies, the Shanghai Stock Exchange calculates industrial index, commercial index, real estate index, public utility index and comprehensive index respectively. The industrial index, commercial index, real estate index, public utility index and comprehensive index of Shanghai Stock Exchange all take1April 30, 993 as the base period, and the base period index is set at 1358.78 points, which was officially announced in June 1993. Taking all industrial stocks, commercial stocks, real estate stocks, public utility stocks and comprehensive stocks listed on the Shanghai Stock Exchange as samples, the calculation is based on the number of all issued shares.

The indexes compiled and published by Shanghai Stock Exchange include Shanghai Stock Exchange Industry Index Series, Shanghai Stock Exchange Strategy Index Series, Shanghai Stock Exchange Style Index Series and Shanghai Stock Exchange Theme Index Series.

3. Stock price index of Shenzhen Stock Exchange

(1) Component Index Category

① Shenzhen Component Index. Shenzhen Stock Exchange has compiled the Shenzhen constituent stock index. Through the investigation of all listed companies in Shenzhen Stock Exchange, according to certain standards, 40 representative listed companies are selected as constituent stocks with the number of shares in circulation as the weight. Using the weighted average method.

② Shenzhen Stock Exchange 100 index. Shenzhen Securities Information Co., Ltd. released the Shenzhen Stock Exchange 100 index in early 2003. The selection of the constituent stocks of Shenzhen Stock Exchange 100 Index mainly examines two indicators: the circulating market value and the transaction amount of A-share listed companies. Select 100 A shares from the stocks listed in Shenzhen Stock Exchange as constituent shares, and take the number of tradable A shares as the weight, and adopt the Paixu comprehensive method to prepare. According to the principle of market dynamic tracking and the stability of constituent stocks, the Shenzhen Stock Exchange 100 index adjusts constituent stocks every six months.

(2) Comprehensive index class. Shenzhen Composite Index Series includes Shenzhen Composite Index, Shenzhen A-share Index, Shenzhen B-share Index, Industry Classification Index, Small and Medium-sized Board Composite Index, Growth Enterprise Market Composite Index, Shenzhen New Index and Shenzhen Fund Index.

① Shenzhen Composite Index. All stocks listed on the main board, small and medium-sized board and growth enterprise market of Shenzhen Stock Exchange are sample stocks. The composite indexes of Shenzhen Stock Exchange are all weighted stock price indexes, that is, the weighted daily chain calculation is based on the number of shares on the calculation date of index sample stocks.

② Shenzhen A-share index. The Shenzhen A-share index takes all A-shares listed on the main board, small and medium-sized board and growth enterprise market of Shenzhen Stock Exchange as sample shares, and takes the total issued share capital of the sample shares as the weight to calculate the weighted daily chain.

③ Shenzhen B-share index. The Shenzhen B-share index takes all B-shares listed on the Shenzhen Stock Exchange as a sample, and takes the total share capital issued by the sample shares as the weight to calculate the weighted daily chain.

④ Industry classification index. Take the stocks listed on the main board, small and medium-sized board and growth enterprise market of Shenzhen Stock Exchange as samples. The industry classification index is based on the classification in the Guidelines for Industry Classification of Listed Companies, and the 13 category index is compiled; According to the classification of manufacturing categories, 9 categories indexes are compiled, and * * * has 22 industry classification indexes. The industry classification index takes the total share capital issued by sample shares as the weight and calculates the weighted daily chain.

⑤ Comprehensive index of small and medium-sized board. Take all the stocks listed on the small and medium-sized board of Shenzhen Stock Exchange as samples. The index weight of small and medium-sized enterprises is the number of shares in circulation, and the weighted daily chain is calculated. The comprehensive index of small and medium-sized board is based on June 7, 2005, and the benchmark index is 1000 points. Published on June 65438+February 2005 1.

⑥ GEM composite index. Take all the stocks listed on the Growth Enterprise Market of Shenzhen Stock Exchange as a sample. The GEM index takes the number of shares in circulation as the weight and calculates the weighted daily chain. The comprehensive index of GEM is based on 201May 3 10, and the base index is 1000 points, which was released on August 20th, 20 10.

⑦ Shenzhen New Index. A-shares listed on the main board, small and medium-sized board and enterprise board of Shenzhen Stock Exchange, which are normally traded and have completed share reform, are sample shares. The new Shenzhen Stock Exchange refers to the weighted daily ring-on-ring calculation based on the number of shares in circulation.