While only few were paying attention to the price of aluminum, some important industry players such as Goldman Sachs, JPMorgan Chase & Co and Glencore Xstrata, were allegedly inflating prices and disrupting supplies for the commodity.
See http://www.mining.com/lawsuits-against-goldman-jpmorgan-glencore-xstrata-for-suspected-aluminum-price-manipulation-pile-up-57037/?utm_source=digest-en-mining-130809&utm_medium=email&utm_campaign=digest.