Shanghai Composite Index, the full name of SSE Composite Index, is a weighted comprehensive stock price index compiled by the Shanghai Stock Exchange, with all stocks listed on the Shanghai Stock Exchange as the calculation scope and issuance as the weight. Simply put, it is a number calculated by weighting the real-time stock price of individual stocks according to the issuance volume. It can reflect the overall situation of the Shanghai Stock Exchange stock market. Its rise means that all listed stocks in the entire Shanghai Stock Exchange market have basically risen. Of course, there are exceptions, but this shows that these stocks occupy a smaller proportion in the entire market. , that is, the weight is small, it cannot determine the direction of the Shanghai Composite Index and can only affect it to a small extent. That is to say, if the Shanghai Composite rises and some stocks fall, Liu Ming, if there are no falling stocks, the Shanghai Composite Index will rise even more. sharp. The Shanghai Composite Index uses December 19, 1990 as the base day, and the base day index is set at 100 points. It has been released since July 15, 1991. Reflects the stock price trends of all A shares and all B shares listed on the Shanghai Stock Exchange. The calculation formula is: the Shanghai Composite Index and sub-indices are weighted based on the number of issued shares of the sample stocks. The calculation formula is:

Reporting period index = total market value of constituent stocks in the reporting period/base period × base period Index

Among them, total market capitalization = ∑ (market price × number of shares issued).

The new Shanghai Composite Index adopts the Paschal weighting method, using the issued share capital of the sample stocks as the weight for weighted calculation. The calculation formula is:

Reporting period index = (reporting period component Total market value of stocks/base period) × base period index

Among them, total market value = ∑ (market price × number of shares issued).

For the calculation of the Shanghai Composite Index, when a new stock is listed, it will be included in the calculation scope one month later.

As several others have said, the Shanghai Composite Index cannot be traded now. However, the current ETFs are related to stock indexes. ETFs are "traded open-end index funds", also known as exchange-traded funds. . It is an open-ended securities investment fund product listed and traded on the exchange, and the trading procedures are exactly the same as stocks. The assets managed by ETFs are a basket of stock portfolios. The types of stocks in this portfolio are the same as the component stocks included in a specific index, such as the Shanghai Composite 50 Index. The number of each stock is consistent with the proportion of the constituent stocks of the index. ETF trading The price is determined by the value of the basket of shares it owns, known as the "unit fund net asset value." The investment portfolio of an ETF usually completely replicates the underlying index, and its net value performance is highly consistent with the specific index it is focused on. For example, the net value performance of the SSE 50 ETF is highly consistent with the rise and fall of the SSE 50 Index.