Further researches on banking industry to suggest bank policies and macro policies for sustainable development is becoming necessary. One of our purposes is to evaluating how much impacts in the market risk of a big listed Vietnam commercial bank, Sacombank-STB with semiannual data. It will serve for better management of bank and will contribute for sustainable economic development. Our traditional methods still be with qualitative analysis including synthesis and inductive, combined with OLS for 9 macro variables, findings show CPI and GDP growth, rate of loans and risk free rate (Rf) will put more impacts on market risk while external indicators (exchange rate and SP500) just put tiny effect on beta CAPM. This study can be functioned as references for further researches in other markets.