LONDON :Trafigura's $600 million case against Indian businessman Prateek Gupta over fake nickel cargoes began at London's High Court on Monday, with the commodities trading company saying it was the victim of a very substantial fraud. Geneva-based Trafigura alleges that Gupta was the mastermind of a fraud it discovered in November 2022, when it inspected some containers that were supposed to contain high-grade nickel. The containers actually held carbon steel worth a fraction of the value of