NEW YORK ( TheStreet) -- CHANGE IN RATINGS:Advance Auto Parts ( AAP) upgraded at JP Morgan to overweight, JP Morgan said. Company can gain market share in an industry that's likely to see a soft landing in 2013. Aecom ( ACM) upgraded at BofA/Merrill from underperform to buy, Bank of America/Merrill Lynch said. $35 price target. Company is seeing a solid recovery in free cash flow. Activision Blizzard ( ATVI) upgraded at Sterne Agee from neutral to buy, Sterne Agee said. $17 price target. Company is positioned well for the next business cycle and the company will likely buy back a significant amount of shares. Biogen Idec ( BIIB) upgraded at Citigroup to buy from neutral, Citigroup said. $187 price target. Expecting a solid Tecfidera launch. Celgene ( CELG) rated new outperform at JMP. $130 price target. Company is a market leader and can continue to deliver solid growth. Discover ( DFS) upgraded at Credit Suisse from neutral to outperform, Credit Suisse said. $47 price target. Company can deliver the best growth in the industry at the lowest valuation. DSW ( DSW) rated new buy at Sterne Agee. $75 price target. Company is a market leader and can deliver above-average growth for the foreseeable future. Guess ( GES) upgraded at Wedbush from neutral to outperform, Wedbush said. $34 price target. There are early signs that the business is turning around in North America. Gartner ( IT) downgraded at Piper from overweight to neutral, Piper Jaffray said. Valuation call, based on a $52 price target. Annaly Capital ( NLY) upgraded at Sterne Agee from underperform to neutral, Sterne Agee said. Valuation call, based on a $14.25 price target. Nuance ( NUAN) downgraded at Needham from buy to hold, Needham said. Company is seeing lower international sales and demand from healthcare customers. MetroPCS ( PCS) upgraded at Nomura from reduce to neutral, Nomura said. $9.50 price target. Worst news appears to be behind the company. Riverbed ( RVBD) downgraded at FBR from outperform to market perform, FBR Capital Markets said. $20 price target. Company is seeing lower core sales.