This paper presents an analysis of the seeds of the recent debt crisis that occurred in the Eurozone area. We use the model of Fleming and Stein (2004) for the analysis. This model has two risk drivers arising from uncertainties in the return on capital and the effective rate of return on net foreign assets. Given the risk drivers, we model the net worth value process of an economy under a stochastic setting and show that opening to the rest of the world by pursuing the growth maximizing leverage strategy is better than remaining closed, as that strategy enhances the growth of the net worth process. Second, we provide an extra condition to show when the excessive leverage poses a threat to the sustainable growth of an economy. In this way, we improve the model introduced by Fleming and Stein as a signal of possible debt crises.