Copper rallies on US home sales Summary Box: Copper rallies on US home sales Feb 24 04:19 PM US/Eastern COPPER'S GLINT: Copper rallied after the housing market showed more signs of improvement. The industrial metal is used to make pipes and wiring for buildings and in a variety of other products. G-20 DEBATES: Investors are expected to monitor developments from a weekend meeting of finance ministers from the world's 20 leading economies. The group will focus on economic growth but Europe's debt crisis likely will be a priority topic. MIXED BAG: Prices for oil, wheat, corn and soybeans rose. Gold, silver and natural gas fell.