The full name of Shanghai Composite Index (namely, Shanghai Composite Index, 0000 1 is its code number in Shanghai Stock Exchange) is a stock index compiled by Shanghai Stock Exchange, which was officially released in February 1990 19. The sample of the stock index is all the stocks listed on the Shanghai Stock Exchange. Through circulation synthesis, the newly listed stocks are included in the calculation range of the stock index after listing 10. The trend of the Shanghai Stock Exchange Index represents the trading situation of all stocks in the Shanghai Stock Exchange, which can be said to be the direction ticket of individual stocks.