Selecting Various Industrial Competitors Affect the Risk Level of Viet Nam Stock Investment Industry

Under a one factor model, this paperwork estimates the impacts of the size of firms’ competitors in the stock investment industry on the market risk level, measured by equity and asset beta, of 6 listed companies in this category. This study identified that the risk dispersion level in this sample study could be minimized in case the competitor size kept as current approximate size (measured by equity beta var of 0,034). Beside, the empirical research findings show us that equity beta min value decreases from 0,247 to 0,244 when the size of competitor doubles. Last but not least, most of beta values are acceptable. Ultimately, this paper illustrates calculated results that might give proper recommendations to relevant governments and institutions in re-evaluating their policies during and after the financial crisis 2007-2011.