股市的涨跌本是正常现象 ,有牛市就必有熊市。可近期来却跌跌不休 ,表层的原因在于政策面上的变化 ,如国有股减持政策的出台 ,国家清理违规资金 ,新发与增发的过于集中 ,而深层的原因还在于基本面 ,上市公司的质量低下 ,以科技为核心的价值评估体系的崩溃。可以说两方面的原因 The stock market ups and downs is a normal phenomenon, a bull market will have a bear market. However, it may be stumbled in the near future. The reasons for this lie in the changes in policies. For instance, the introduction of state-owned stock reduction policies, the state’s liquidation of non-compliance funds, over-concentration of new hair and hair extensions, and the deeper reasons are still the fundamentals. Listed companies The quality of the low, science and technology as the core value of the collapse of the evaluation system. Can be said that two reasons