Glencore allegedly was involved in a price fixing scandal to artificially inflate the price of aluminum. The United States´ Commodity Futures Trading Commission (CFTC) has issued a “do not destroy” order pending a formal investigation of these allegations.

International Business Times (2013): Goldman Sachs and Glencore Aluminium ‘Hoarding’ Faces US Regulator Scrutiny, 23 July; accessed 2.9.2013