When Glencore proposed a combination with Rio Tinto Group a decade ago, the larger company turned it down after just a few days. News this week that the two spent several months in negotiations in the second half of last year shows how the sands have shifted,

Both Glencore and Rio own some of the best copper mines in the world. However, Rio — like BHP — still depends heavily on iron ore to drive its profits, at a time when China’s decades-long construction boom is drawing to an end and the iron ore market appears headed for an extended period of weakness.

Rio Tinto Group y Glencore Plc han estado discutiendo la posibilidad de combinar sus negocios, según personas familiarizadas con el asunto, en lo que podría resultar en el mayor acuerdo de la historia de la industria.