December 19th, 199. The historical lowest point of the Shanghai Composite Index is 95.79 formed on December 19th, 199, and the historical highest point is 6124.4 formed on October 16th, 27, so the historical Shanghai Composite Index has also experienced many changes, and the current Shanghai Composite Index is also fluctuating continuously before this highest and lowest point.

Extended information:

The Shanghai Stock Composite Index is referred to as "Shanghai Stock Index" or "Shanghai Stock Composite Index" for short. Its sample stocks are all listed on the Shanghai Stock Exchange, including A shares and B shares, which reflect the changes in the prices of listed stocks on the Shanghai Stock Exchange and have been officially released since July 15, 1991.

to calculate the stock index, three factors should be considered:

sampling, that is, extracting a few representative constituent stocks from many stocks;

weighted, weighted average by unit price or total value, or unweighted average;

calculation program, calculating arithmetic average, geometric average, or considering price and total value.

due to the variety of listed stocks, it is arduous and complicated to calculate the average price or index of all listed stocks, so people often choose several representative sample stocks from listed stocks and calculate the average price or index of these sample stocks. Used to indicate the general trend and fluctuation range of stock prices in the whole market. When calculating the stock price average or index, the following four points are often considered:

Sample stocks must be typical and common. Therefore, the industry distribution, market influence, stock grade, appropriate quantity and other factors should be comprehensively considered when selecting sample stocks.

The calculation method should be highly adaptable, and can make corresponding adjustments or corrections to the ever-changing stock market, so that the stock index or average has better sensitivity.

there should be scientific calculation basis and means. The calculation basis must be unified, generally based on the closing price, but with the increase of calculation frequency, some are calculated at the hourly price or even shorter time.

the base period should be well balanced and representative.

the SSE fund index is weighted by the fund issuance shares, and the calculation formula is: reporting period index = (total market value/base period of the fund in the reporting period) × 1, where the total market value = σ (market price × issuance shares).

the Shanghai composite index is weighted by the number of issued shares of sample shares, and the calculation formula is: reporting period index = (total market value of constituent shares in the reporting period/base period) × base period index, where the total market value = σ (stock price × number of issued shares). When calculating the B-share index of Shanghai Stock Exchange, the price of B-shares in constituent stocks is calculated in US dollars. When calculating other indexes, the price of B shares in constituent stocks is converted into RMB at the applicable exchange rate (the middle price of RMB against the US dollar on the last trading day of each week in China Foreign Exchange Trading Center).