Did you guys catch the article this weekend about how Goldman Sachs is using a loophole to control the aluminum market? Those guys sure are shrewd. I recall a Rolling Stone article that described them as 'The world's most powerful investment bank is a great vampire squid wrapped around the face of humanity, relentlessly jamming its blood funnel into anything that smells like money.'
Here's the link about how they are making money on aluminum...
http://www.mlive.com/business/detroit/index.ssf/2013/07/new_york_times_how_goldman_sac.html