Copper traded almost unchanged on Thursday, as investors exercised caution ahead of a meeting between U.S. and Chinese presidents later this week. Copper is widely used in construction and manufacturing and is seen by investors as a gauge of economic health. A stand-off between the United States and China, the world’s top two economies, has been hurting copper prices. U.S. President Donald Trump said on Wednesday that a trade deal with Chinese President Xi Jinping was possible this weekend, but he stressed that he was prepared to impose U.S. tariffs on virtually all remaining Chinese imports if the two countries ... (full story)