Edoardo Cignoli : Buffett Increases Stake in Sheetrock Maker USG

Warren Buffett's Berkshire Hathaway has increased its stake in building-products company USG.



via WSJ.com: US Business http://online.wsj.com/article/SB10001424052702303370904579296233248314744.html?mod=pls_whats_news_us_business_f