United Microelectronics Corporation (NYSE:UMC – Get Free Report) shares gapped down before the market opened on Monday . United Microelectronics shares last traded at $17.9820, with a volume of 2,614,379 shares traded. BNP Paribas Exane reissued an “underperform” rating on shares of United Microelectronics in a report on Thursday, May 28th. Wall Street Zen upgraded shares of United Microelectronics from a “hold” rating to a “buy” rating in a research report on Saturday, July 25th. Featured ArticlesReceive News & Ratings for United Microelectronics Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for United Microelectronics and related companies with MarketBeat.com's FREE daily email newsletter.