The Shanghai and Shenzhen 300 Index takes scale and liquidity as two basic criteria for sample selection, which gives greater weight to liquidity, in line with the characteristics of the index positioning as a transactional index.
After sorting listed companies, they are selected, and detailed selection conditions are also stipulated. For example, the listing of new shares (except a few large-cap stocks) will not enter the index soon. Generally speaking, stocks listed after a quarter are likely to be selected as sample stocks of the index; Exclude stocks suspended from listing, ST stocks, stocks with abnormal operating conditions or serious losses, and stocks with large stock price fluctuations that obviously manipulate market performance.
Therefore, the 300 index reflects the comprehensive changes of the stock prices of representative stocks with strong liquidity and large scale, which can provide investors with authoritative investment direction, facilitate investors to track and combine, and ensure the stability, representativeness and operability of the index.
Extended data Both Shanghai and Shenzhen stock markets have independent comprehensive indexes and component indexes, which are highly recognized by investors, but the market lacks cross-market indexes that reflect the overall trend of the Shanghai and Shenzhen stock markets. The launch of the Shanghai and Shenzhen 300 Index has met the market demand, adapted to the changes in investor structure, increased the index for observing market trends, and further provided conditions for market product innovation.
Both the composite index and the constituent stock index only represent the respective market trends of the two markets, and do not have the ability to reflect the overall trend of the Shanghai and Shenzhen markets. The Shanghai and Shenzhen 300 Index is a "barometer" reflecting the overall trend of the Shanghai and Shenzhen markets. The index sample is selected from Shanghai and Shenzhen stock markets, covering most of the circulating market value. Component stocks are mainstream investment stocks with good market representation, high liquidity and active market transactions, which can reflect the income of mainstream investment in the market.
Baidu Encyclopedia-CSI 300