The stock index is obtained by weighted average of constituent stocks, which reflects the overall ups and downs of constituent stocks in the index. At present, there are Shanghai Stock Exchange Index (1), Shenzhen Stock Exchange Index (3991), Growth Enterprise Market Index (3996) and science and technology innovation board Stock Exchange Index (688).

it is a reference indicator compiled by a stock exchange or a financial service institution. Due to the volatility of stock prices, investors are bound to face market price risks.