The Seventh Circuit sitting en banc has unanimously held that potash purchasers stated a claim under federal antitrust laws. Potash is a mineral used in fertilizers; as a homogenous commodity, purchasers use price to choose between suppliers. Purchasers led by Minn-Chem claim that seven potash producers (Agrium, Potash Corp., Mosaic, Uralkali, Belaruskali, Silvinit, and IPC) conspired in a global cartel to raise prices from 2003 to 2008. According to the complaint, prices were inflated through restrained output, excess capacity, and joint ventures to exchange information and monitor compliance with the cartel.
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