UPDATE: Stifel Nicolaus Downgrades Armstrong World Industries to Hold

Stifel Nicolaus lowers its rating to Hold on Armstrong World Industries

as it believes shares are fully valued. Stifel Nicolaus says, "We are downgrading the shares of Armstrong World from a Buy to a Hold as the stock has appreciated 71% since October 3, 2011, when the homebuilding stocks began to move aggressively upwards. The stock has had a recent spike of 7.7% in the past week as the company announced its Board of Directors is considering another one-time dividend of $8.55 per share to be paid sometime in May 2012." AWI closed at $57.19 a share on Tuesday.