Tuesday night, copper prices crashed dramatically. This could lead to pain for the countries that mine the metal.
Morgan Stanley recently published a "Commodity Manual" analyzing various commodity markets. In their discussion of copper, they included a chart showing the major copper producing countries and regions. If copper prices drop further, the copper mining industry in these countries could take a big hit.
Chile is the biggest single producer of the metal. Africa and Peru have been stepping up their production over the last several years as well:
Morgan Stanley