FinanceBillionaire Carlos Slim’s stake in US operator grows once againGrupo Carso’s interest in Talos Energy up to 23.6%Mexican billionaire Carlos Slim speaks after a meeting with Brazil’s President Luiz Inacio Lula da Silva, at the Planalto Palace in Brasilia, Brazil, earlier this year.Photo: REUTERS/SCANPIXRobert StewartNorth America Energy CorrespondentBaton Rouge