The Risk Level of Viet Nam Stock Investment Industry Under Financial Leverage During and After The Global Crisis ۲۰۰۹-۲۰۱۱

This paperwork evaluates the impacts of external financing on market risk for the listed firms in the Viet nam stockinvestment industry, esp. during and after the financial crisis ۲۰۰۹-۲۰۱۱.First of all, by using quantitative and analytical methods to estimate asset and equity beta of total ۶ listed companiesin Viet Nam stock investment industry with a proper traditional model, we found out that the beta values, in general,for many institutions are acceptable. Second, under ۳ different scenarios of changing leverage (in ۲۰۱۱ financialreports, ۳۰% up and ۲۰% down), we recognized that the risk level, measured by equity and asset beta mean,decreases when leverage increases to ۳۰% but increases more if leverage decreases down to ۲۰%. Third, bychanging leverage in ۳ scenarios, we recognized the dispersion of risk level, measured by equity beta var, increasesfrom ۰,۰۳۸ to ۰,۰۴۰if the leverage increases to ۳۰% whereas decreases to ۰,۰۳۶ if leverage decreases to ۲۰%. Butthe dispersion measured by asste beta var decreases to ۰,۰۴۶ (leverage down ۲۰%), showing leverage efficiency.Finally, this paper provides some outcomes that could provide companies and government more evidence inestablishing their policies in governance.