Arch Coal (ACI) was upgraded today by analysts at UBS and the stock is now at $56.35, up $3.98 (7.60%) on volume of 4,566,991 shares traded. The brokerage firm raised its rating on the stock to "Buy" from "Neutral." Over the last 52 weeks the stock has ranged from a low of $28.59 in August to a high of $77.40 in June. Arch Coal stock has been showing support around $48...(Click the story link or go to http://www.marketintelligencecenter.com for the full story)