Things are looking up for Banco Latinoamericano de Comercio Exterior (NYSE: BLX), also known as Bladex, a bank that specializes in trade finance in Latin America. Its second-quarter earnings report was highlighted by a return to growth in its balance sheet and improving credit metrics, despite continued clouds over Latin America's economic and political future.Here's the skinny on this unique bank's second-quarter earnings results.Bladex purposefully pulled back on originations in recent months, which resulted in declining net interest income this quarter.