Just found this article in the New York Times about how the banks are artificially driving up the prices of metal (the article is focused on aluminum, but I wouldn't be surprised if it extends to other commodities as well) in the commodities market.
But heaven forbid we regulate them to stop this economic drag, right?
And I don't know, but I'd bet a great deal of money that most of the algorithmic trading going on all the time has similar results in the stock market. But we wouldn't want to stop that, would we? After all, that liquidity is valuable to everyone, right? Right?