This paper applies a basic RBC model (Real Business Cycles) for Colombia whose relevance lies in the standard behavior of a small open economy (volatile investment and productivity) as opposed to smooth consumption (procyclical consumption, investment and countercycical trade balance). For this purpose, it follows closely the work of S. Schmitt-Grohe, M. Uribe (2004), which shows how investment reacts very differently to productivity shocks in business cycles open economies compared to closed economies. The calibration of a stochastic general equilibrium model reproduces the stylized facts for Colombia in the period 2001-2011, identifying the response of the main economic variables to technology shocks.