Analyst Upgrades

• DuPont (DD) was upgraded to buy from neutral at Goldman.
• UBS upgraded Deere (DE) to buy from neutral and AGCO (AGCO) to neutral from sell.
• Canadian Solar (CSIQ) was upgraded to outperform from neutral at Macquarie.
• Thoratec (THOR) and DTE Energy (DTE) were upgraded to overweight from equal weight at Barclays.
• NICE Systems (NICE) was upgraded to overweight from neutral at HSBC.
• Deutsche Bank upgraded Copa Holdings (CPA) to buy from hold.
• BofA/Merrill upgraded Nu Skin (NUS) to buy from neutral.
• Continental Resources (CLR) was upgraded to buy from hold at Jefferies.

Analyst upgrades:

• Keefe Bruyette upgraded Intercontinental Exchange (NYSE: ICE) to Outperform from Market Perform on expectations that derivatives trading will increase in the coming quarters.
• NutriSystem (NASDAQ: NTRI) was upgraded to Buy from Neutral by Janney Montgomery, which believes that the company's earnings have hit bottom, while the company could report better-than-expected Q1 results.
• Harley-Davidson (NYSE: HOG) was upgraded to Outperform from Sector Perform at RBC Capital. The firm thinks the company is an early-cycle story that has significant upside potential.
• UBS upgraded Walgreen (NYSE: WAG) to Buy from Neutral citing cost cutting efforts and slowing store growth.
• Google (NASDAQ: GOOG) was upgraded to Buy from Hold at Benchmark Co.
• Safeway (NYSE: SWY) was upgraded to Buy from Hold by BB&T.
• Needham upgraded Targacept (NASDAQ: TRGT) to Buy from Hold.
• Sierra Wireless (NASDAQ: SWIR) was raised to Buy from Hold at Jesup & Lamont.

Analyst upgrades:

• FBR Capital upgraded Talbots (NYSE: TLB) to Outperform from Market Perform as it believes the company's inventory and SG&A control should help earnings and the stock's risk/reward is compelling at current levels. The firm raised its target on shares to $7 from $5.
• ThinkEquity upgraded Human Genome (NASDAQ: HGSI) to Buy from Accumulate to reflect higher assumptions for the company's Lupus treatment Benlysta. The firm raised its target on shares to $26 from $18.
• KeyBanc upgraded Parkway Properties (NYSE: PKY) to Buy from Hold based on valuation, improving fundamentals, and stable capital position. The firm has a $17 target on the stock.
• HSBC Holdings (NYSE: HBC) was upgraded to Overweight from Neutral at JPMorgan.
• BioScrip (NASDAQ: BIOS) was upgraded to Overweight from Neutral at Piper Jaffray.
• DISH Network (NASDAQ: DISH) was upgraded to Outperform from Neutral at Credit Suisse.