近年来,我国证券市场发生了深刻变化,证券投资基金规模稳步增长,合格境外机构投资者(QFII)、保险公司、社保基金等机构投资者发展迅速,多元化的机构投资者格局初步形成,股票市场日益稳定。然而,我国股票市场作为一个新兴市场,非系统风险仍然较大。因此,控制与防范股票市场的非系统风险尤为重要。 In recent years, profound changes have taken place in the securities market in our country. The size of securities investment funds has grown steadily. Institutional investors such as qualified foreign institutional investors (QFIIs), insurance companies and social security funds have developed rapidly. A diversified institutional investor pattern has taken initial shape. The market is increasingly stable. However, China’s stock market as an emerging market, non-systematic risk is still large. Therefore, it is especially important to control and prevent the non-systematic risk in the stock market.