NEW YORK ( TheStreet) -- CHANGE IN RATINGS Advance Auto Parts ( AAP) upgraded at UBS to Buy from Neutral, UBS said. $90 price target. Company is poised for more consistent execution. AK Steel ( AKS) downgraded at Morgan Stanley from Overweight to Equal-weight, Morgan Stanley said. Valuation call, based on a $14 price target. Acme Packet ( APKT)rated new Equal-weight at Morgan Stanley. SBC market growth should continue to slow in 2012. Arris Group ( ARRS) upgraded to buy at TheStreet Ratings Autozone ( AZO) upgraded at Goldman from Sell to Neutral, Goldman Sachs said. $370 price target. Commercial rollout is gaining traction. Bank of America ( BAC) downgraded at Goldman from Buy to Neutral, Goldman Sachs said. Company needs to cut costs and faces high execution risks. Brocade ( BRCD) rated new Hold at Kaufman. $6 price target. Company faces sales headwinds in the first half of the year. Cal-Maine Foods ( CALM) upgraded to buy at TheStreet Ratings. Citigroup ( C) upgraded at Goldman to Buy from Neutral, Goldman Sachs said. Company has a clear path to return capital. CF Industries ( CF) downgraded at Dahlman from Buy to Hold, Dahlman Rose said. Valuation call, based on a $180 price target. Copart ( CPRT) downgraded at Goldman from Neutral to Sell, Goldman Sachs said. Valuation call, based on a $46 price target. End-market demand appears to be peaking. DR Horton ( DHI) downgraded at KBW to Market Perform, Keefe, Bruyette & Woods said. Valuation call, based on a $15 price target. Hain Celestial Group ( HAIN) added to Top Picks Live at Citigroup. $46 price target. Well positioned for solid growth in 2012. Kellogg ( K) downgraded at JP Morgan from Overweight to Neutral, JP Morgan said. $48 price target. Earnings will likely disappoint over the next couple of years. KAR Auction ( KAR) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. End-market demand is bottoming and the company can deliver accelerated earnings growth. $17 price target. Legg Mason ( LM) upgraded at KBW from Market Perform to Outperform, Keefe, Bruyette & Woods said. $31 price target. Flow trends are improving. Morgan Stanley ( MS) upgraded at Goldman from Neutral to Buy, Goldman Sachs said. Company was also placed on the Conviction List. $23 price target. Company is focused on fixing legacy issues.