Since the RMB exchange rate reform in 2005, the elasticity of RMB exchange rate is becoming higher, and the financial institutions pay more and more attention to the exchange rate risk. Under this background, this paper constructs a SJC Copula model to evaluate the commercial banks' exchange rate risk. The empirical results show that the low tail risk is significant, and the upper tail risk is different as the econ6mic link varies. Thus, in order to control the exchange rate risk, the commercial banks should stress more on risk evaluation, enh...