Commodity traders make a living by supplying the world with raw goods like oil and metal - no matter how war-torn, famine-stricken or corrupt the country of origin. It is an industry that affects us all, but whose inner workings have been deliberately concealed from our view. Now, two Bloomberg journalists tell the inside story of how raw materials are bought and sold in the twenty-first century. When it comes to trading in raw materials, there are no rules ...