The initial constituent stocks of the SME 1 and 100 indexes consist of the first batch of 100 listed stocks. After that, it is necessary to sort the short-listed stocks and select the constituent stocks.
Small and medium-sized board 100 index sampling index refers to the ratio of the average circulating market value to the average transaction amount within a period of time (usually in the first six months).
When selecting samples, first calculate the ratio of the average circulating market value and the average transaction amount of the shortlisted stocks in the market, and then average the above indicators with a weight of 2: 1, and the calculation results are sorted from high to low. Referring to the corporate governance structure, operating conditions, development potential, industry representativeness and other factors, the small and medium-sized board 100 index stocks are selected according to the buffering technology.
2. The sample of the Shanghai and Shenzhen 300 Index covers about 60% of the market value of the Shanghai and Shenzhen markets, and has good market representativeness and investability.
A. The Shanghai and Shenzhen 300 Index is based on June 5438+February 3, 20041,with a base point of 1000. Its calculation is based on the adjusted share capital, and it is calculated by the formula of licensed weighted comprehensive price index. Among them, the adjusted share capital is obtained according to the classification method.
B, where the constituent stocks pay dividends, the index will not be adjusted, so that it will naturally fall.
C. The Shanghai and Shenzhen 300 Index will periodically adjust the constituent stocks, and the adjustment principles are as follows:
In principle, (1) index constituent stocks are adjusted once every six months, generally in the first ten days of1of 65438+ and the first ten days of July, and the adjustment plan is announced two weeks in advance.
(2) Each adjustment ratio shall not exceed 10%. Sample adjustment sets the buffer, and the new samples ranked within 240 will enter first, and the old samples ranked before 360 will be reserved first.
(3) In principle, stocks with losses in the latest financial report will not enter the newly selected sample unless the representativeness of the index is affected.
As the Shanghai and Shenzhen 300 index covers the Shanghai and Shenzhen stock markets, the overall market representation is good, and it has the highest voice in the index selection of China's stock index futures, and has become the target of China's stock index futures.