Today's noteworthy upgrades include: Polypore (PPO) upgraded to Outperform from Neutral at RW Baird...Kraton Performance (KRA) upgraded to Buy from Hold at KeyBanc...Alliant Energy (LNT) upgraded to Outperform from Market Perform at Wells Fargo...M.D.C. Holdings (MDC) upgraded to Buy from Neutral at Goldman...Tenneco (TEN) upgraded to Conviction Buy from Buy at Goldman...Kelly Services (KELYA) upgraded to Buy from Neutral at Citigroup...FedEx (FDX) upgraded to Buy from Neutral at BofA/Merrill...Colfax (CFX) upgraded to Buy from Neutral at BofA/Merrill...Comerica (CMA) upgraded to Outperform from Sector Perform at RBC Capital...Brown & Brown (BRO) upgraded to Outperform from Market Perform at William Blair...Disney (DIS) upgraded to Buy from Neutral at Davenport...Kenneth Cole (KCP) upgraded at Sterne Agee. :theflyonthewall.com