METALS-Copper nudges higher as China-U.S. trade war concerns ease

(Updates prices) By Melanie Burton MELBOURNE, May 21 (Reuters) - Copper edged higher on Monday after China and the United States put their trade row "on hold", easing concerns that the dispute could escalate, although headwinds from a stronger dollar capped further gains. "It appears that America and China have moved towards a trade deal, which will mean the expansion of U.S. goods purchased by China, and thus, avoiding the prospect of an out-and-out trade war," said Kingdom Fu