Gold headed for the biggest weekly loss in three years as progress in US-China trade talks hammered demand for havens and sent miners’ shares tumbling. The metal dropped 3.7% this week, the most since November 2016, as China and the US indicated they are heading toward an interim deal to halt the trade war. Some signs of stabilization in the global economy have also dented gold’s allure, and JPMorgan Chase & Co and Citigroup closed out their bets on the traditional haven.