From Argentina to Brazil to Mexico to Venezuela, the largest Latin American economies are suffering from collapsing commodities prices, slowing or lost growth and widening corruption scandals. Then there's Colombia. It has its share of trouble too. Oil is its chief export, and the 14-month crude-price collapse has pushed the peso down 37 percent and the COLCAP stock index down 53 percent. Obscured by these devastated markets, though, there's evidence to suggest that Colombia, with a population greater than Spain's and more land than France, is the dark horse among international investors.