From 1990 to 20 10, Shanghai Stock Exchange (hereinafter referred to as "SSE") has developed from 8 stocks and 22 bonds into a company with 894 listed companies, 938 stocks, 18 trillion stocks, 199 national bonds and 284 companies.
Revision of the index:
1. Newly listed. For composite index (Shanghai Composite Index and New Shanghai Composite Index) and sub-index (A-share index, B-share index and industry sub-index), all newly listed securities with constituent stocks will be included in the index on the 1 1 trading day after listing.
2. Ex-dividend. Where the constituent stocks are ex-dividend, the index will not be revised and let it fall naturally.
3. ex-rights. If there are constituent stocks that have been sent or allotted shares, the index shall be revised before the benchmark date of ex-dividend of the constituent stocks. Revised market value = ex-dividend quotation × ex-dividend shares+market value before revision (excluding ex-dividend shares);
4. Exchange rate changes. On the last trading day of each trading week, the index is revised according to the central parity of RMB against USD in China Foreign Exchange Trading Center on that day.
5. Pause. When the constituent stocks are suspended, the normal final transaction price is used to calculate the index.
6. delisting. If the constituent stocks are delisted (terminated), the index shall be revised before the delisting date.
7. Changes in share capital. Where there are other changes in the share capital of the constituent shares (such as the listing of additional shares leading to the increase of circulating share capital, etc.). ), the index should be revised before the change of constituent share capital. Corrected market value = closing price × adjusted share capital+market value before correction (excluding changed shares);
8. The market is closed. When A shares or B shares partially close, the index will be calculated as usual; When all A shares and B shares close, the index will stop counting.
The meaning of index:
Mainly depends on the trend. Due to the volatility of stock prices, investors are bound to face market price risks. It is easy for investors to know the price changes of a specific stock, but it is neither easy nor annoying to know the price changes of various stocks one by one. In order to adapt to this situation and need, some financial service institutions make use of their professional knowledge and the advantages of being familiar with the market to compile stock price indexes and publish them publicly as indicators of market price changes. Based on this, investors can test the effect of their investment and predict the trend of the stock market. At the same time, the press, company bosses and even political leaders also use this as a reference index to observe and predict the social, political and economic development situation.
This stock index, that is, the average price indicating the changes in the stock market. A stock index is usually compiled based on a certain month of a year, and the stock price in this base period is 100. The stock prices in subsequent periods are compared with the base period price, and the percentage of rise and fall is calculated, which is the stock index of this period. Investors can judge the trend of stock price according to the rise and fall of the index. And in order to reflect the trend of the stock market to investors in real time, almost all stock markets will announce the stock price index at the same time as the stock price changes.
Shanghai composite index