Since the 2008 financial crisis, the total assets managed by U.S. mutual funds have frequently hit new highs and the industry has become increasingly concentrated. In the meantime, two strategies have emerged in the American mutual fund industry: active and passive management. What factors affect the market shares of firms that adopted these two different strategies?

Building on strategic management theories, I suggest that mutual fund families that adopted active and passive management strategies tend to compete in different dimensions. Active management fund families tend to implement the product differentiation strategy, competing on “product quality” through excess-returns, innovative and differentiated fund products; passively managed fund families focus more on "price competition" by conducting an overall cost leadership strategy.

This research examines the driven factors of fund families’ market share. The results show that: the market share of actively managed fund families is more sensitive to positive impact of fund performance, while passive management firms are more sensitive to negative effect of management fees and total loads; 12b-1 expense improves the competitiveness of active fund families and thus enhance their market shares but it has negative impact on passive fund families. In addition, high turnover decreases the market share of all fund families, especially for passively managed families. The outcome reveals the latest US mutual industry orientation: products differentiation, turnover, management fee have greater impact on market share while the competition of fund performance is diminishing. The Matthew effect in US mutual fund industry is outstanding. Industrial competition dimension expands from performance and products to cost cutting.

Empirical analysis on Chinese mutual fund families is also conducted. Different from the US, there is only small number of mutual fund families targeting passive management products. The results show that the distribution channel has the largest impact on Chinese mutual fund family market share and investors are more willing to chase performance than to consider cost-efficient fund families. This study then analyses reasons behind the difference of Chinese and American mutual fund industries.

This dissertation focuses on risk prevention and regulatory issues of financial asset trading platforms, exploring the composition of a financial asset trading platform and its risks, formulating the general framework of platform risk prevention and regulation, and discussing the methodologies for monitoring and managing the risk of financial assets trading platform. The dissertation is divided into eight chapters. The first chapter is the introduction, which discusses the current status in this research field, the motivation and significance of the research topic. The second chapter discusses the transaction cost theory, information asymmetry theory, financial risk management theory, financial supervision theory and other related basic theories related to financial asset trading platform risk prevention and supervision. The third chapter presents the definition, the main types, the generating mechanism and the transmission mechanism of the financial asset trading platform. The fourth chapter elaborates theoretically on the general framework of financial asset trading platform risk prevention and supervision based on the aspects of basic principles, key tasks, applicable methods and constituent elements. The fifth chapter discusses the performance of financial asset trading business, asset return trading business, financing business and information coupling business on financial asset trading platforms, and analyzes the risk prevention of financial asset trading platforms from a business perspective. The sixth chapter discusses the development of financial asset trading platforms in developed countries, and summarizes the experience and practice of their risk prevention and supervision based on four categories of business lines. On this basis, the dissertation draws the inspiration and implications for the future development of the trading platforms in our country. The seventh chapter puts forward policy recommendations regarding risk prevention and supervision of financial asset trading platforms in five aspects: legal positioning, credit information system, protection of consumer rights, self-discipline management and business supervision.