CSI 500 Index is an index developed by China Securities Company, also known as CSI Small Cap 500 Index. The CSI 500 Index consists of all A-shares after the top 500 stocks in the Shanghai and Shenzhen stock markets in the last year are excluded from the top 300 stocks in the total market value and the bottom 20% stocks.

It can be used to reflect the stock price performance of a group of small and medium-sized companies in China A-share market. The sample stocks of CSI 500 Index are generally adjusted once every six months, and the sample proportion of each adjustment is generally not more than 10%.

Extended data:

Calculation method

The weight of the Shanghai and Shenzhen 300 Index is the adjusted share capital, which is calculated by the licensed weighted comprehensive price index formula. Among them, the adjusted share capital is obtained according to the classification method. The grading method is shown in the following table:

For example, if the free circulation ratio of a stock is 7%, which is lower than 10%, the free circulation share capital will be taken as the weight; The free circulation ratio of a stock is 35%, which falls within the range of (30,40), and the corresponding weighted ratio is 40%, so 40% of the total share capital is used as the weight.