Century Aluminum Company (NASDAQ:CENX – Get Free Report) traded up 13.6% during mid-day trading on Friday . Zacks Research downgraded Century Aluminum from a “hold” rating to a “strong sell” rating in a research note on Wednesday, July 8th. Finally, Smartleaf Asset Management LLC boosted its position in shares of Century Aluminum by 48.3% during the fourth quarter. Century Aluminum is headquartered in the United States and is focused on energy-efficient operations and cost management. Recommended StoriesReceive News & Ratings for Century Aluminum Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Century Aluminum and related companies with MarketBeat.com's FREE daily email newsletter.