产业组织理论认为:一个行业的市场结构(Structure)决定企业在市场中的行为(Conduct),进而通过企业行为决定市场运行的绩效(Performance),即经典的S-C-P分析框架。而产业集中度是市场结构的主要内容,也是衡量市场竞争程度的重要标志。本文以产业组织理论的SCP框架为出发点分析我国证券业集中度对绩效的影响作用,以及分析当前我国证券行业的发展状态和原因,并在此基础上提出相应的政策建议。 According to the theory of industrial organization, the structure of an industry determines the conduct of the enterprise in the market, and then determines the performance of the market through the behavior of the enterprise, that is, the classic S-C-P analysis framework. Industrial concentration is the main content of the market structure and also an important indicator of the degree of market competition. Based on the SCP framework of industrial organization theory, this paper analyzes the impact of securities concentration on the performance, as well as the current state and reasons of the securities industry in our country. Based on this, we put forward the corresponding policy recommendations.