Empirical Analysis On Open-load Security Investment Fund Portfolio During The Transition Period Of Chinese's Securities Market

In recent years the Chinese securities investment funds, particularly the open-ended equity funds have been growing rapidly, and bringing larger influence to the securities market. These funds have become the most important institutional investors in financial market. Securities Investment Fund's investment portfolio has begun to guide and influence other investors'investing behavior and construction of their investment portfolio, particularly small and medium investors.There has a breif introduction about the phylogeny and feature of security market and equity investment fund in this article. On the same time, I expatiated the varius portfolio theories and multi-target model which were popular in the world wide,then the portfolio method was optimized by concerning of fundamental analysis. After that, I finally optimized the portfolio of objected equity fund with the brand-new methodoligy. The result of emperical analysis shows that the risk level of the portfolio has a remarkable decline, on the other hand, the portfolio realized an excessive earning.Simultaneously, the limitations of Chinese security investment funds were discovered in the process of optimization. In connection of the limitations, some thoughts of how to forster institutional investors in security market are also invovled in this essay.