There are few commodities more volatile than iron ore. While many base metals and other products that are bought and sold often have unpredictable and strong price movements, bulk metals frequently see more severe price changes. The Rio Tinto Group (NYSE:RIO) is the largest iron ore producer in the world. The British-Australian company gets nearly 80 percent of the mineral provider's profits from the iron ore market, but the industry leader also sells aluminum, copper, and other minerals. Rio sells primarily into the seaborne industry, and China makes up over two-thirds of the demand in this part of the market.