Commodity trader Trafigura told London’s High Court on Thursday that Indian businessman Prateek Gupta had woefully failed to show its employees knew of or took part in a $600 million metals fraud, as lawyers made closing arguments in a long-running case. Gupta's lawyers countered that unusual trading practices indicated Trafigura staff devised the scheme at the heart of the dispute, which involved substituting cheap or worthless metals for high-value nickel. Geneva-based Trafigura, which sued Gupta more than two years ago, has repeatedly insisted no employees knew of the fraud until cargo inspections in November ... (full story)