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 the listed companies are sorted, they are selected and detailed selection conditions are stipulated. For example, listed new shares (except a few large-cap stocks) will not enter the index soon. Generally speaking, stocks listed for one 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.
As the trading target of the upcoming stock index futures, Shanghai and Shenzhen 300 has attracted more and more attention from the market. At the same time, its good market performance also makes the performance of index funds with it as the investment target more prominent. As an index that emphasizes trading and investment, the fundamental characteristics of its constituent stocks are mainly based on financial indicators such as profitability, growth ability, dividends and valuation. , make a simple analysis of the changes of its fundamental characteristics since the introduction of the Shanghai and Shenzhen 300 Index.