RTRS: METALS-Copper hits 1-week high on U.S. demand prospects
* Focus moving to OECD demand away from China
* But copper stocks still rising, up 84 percent since July * Eyes on Fed statement
(Adds official prices, comment)
By Pratima Desai
LONDON, Dec 16 (Reuters) - Copper soared to a one-week high on Wednesday as investors bought on improved industrial activity and expectations of stronger demand in the United States, the world's largest economy.