Workers perform maintenance on the Laurus oil-drilling rig operated by Petroleos Mexicans (Pemex) at Campeche Bay off the coast of Ciudad del Carmen, Mexico, earlier this month. Bloomberg News MEXICO CITY—Mexico on Wednesday set aside the bulk of its currently active oil fields for Petróleos Mexicanos but said private companies will be allowed to bid on four-fifths of prospective resources as the government ends the national oil firm’s seven-decade monopoly. Officials hope that the bidding, starting as soon as next year, will spark an energy boom. Pemex’s chief executive said the new competition will help the company, making it more efficient. “Pemex has been waiting for these changes for decades,” CEO Emilio Lozoya said in an interview at its headquarters here. “We’re committed to making sure that Pemex continues to be not only the largest company in Mexico, but to regain the largest spot in Latin America and be […]