The Organization for Economic Cooperation and Development passed new guidance for companies involved in the so-called “conflict minerals” trade in countries like Democratic Republic of Congo. The guidance offers a non-binding code of conduct that more than 40 countries have agreed to promote...Mineral buyers such as Traxys SA, Malaysia Smelting Corp. and Amalgamated Metals Plc have cut or halted purchases from Central Africa...The new rules will clarify how companies can work in conflict zones by managing risks in their supply chains, Lahra Liberti, OECD adviser on international law, said...