Analyst Upgrades

• Dynegy (DYN) was upgraded to buy from neutral at Pritchard.
• Itron (ITRI) was upgraded to neutral from underperform at Macquarie.
• Goldman upgraded Ameren (AEE) to sell from conviction sell.
• Signet Jewelers (SIG) was upgraded to buy from hold at Societe Generale.
• JPMorgan upgraded Synopsys (SNPS) to overweight from neutral.

Analyst Upgrades

• SunTrust upgraded Lennox (LII) to buy from neutral, given signs of improved residential HVAC equipment and service demand and a bottom in commercial lines. The firm has a $55 price target on the stock.
• Cowen upgraded Universal Display (PANL) to outperform from neutral. The firm expects OLED display growth to accelerate driven by increased handset and other mobile device penetration, followed by high-end TV and lighting applications.
• Canaccord upgraded Amylin (AMLN) to hold from sell following Roche's (RHHBY) delay in its Phase 3 study for taspo, a competitor to Amylin's bydureon. The firm has an $18 target on Amylin shares.
• DiamondRock Hospitality (DRH) was upgraded to buy from hold at Citigroup.
• Public Service (PEG) was upgraded to conviction buy from buy at Goldman.
• QuinStreet (QNST) was upgraded to overweight on valuation at Thomas Weisel.

Analyst upgrades:

• Stanford raised Fluor (NYSE: FLR) to Hold from Sell primarily due to valuation.
• Citigroup upgraded Cadence Designs (NASDAQ: CDNS) to Buy from Hold because they think the company's cost restructuring initiative and its new CFO will be catalysts for the shares.

Analyst downgrades:

• Stephens dropped Ann Taylor (NYSE: ANN) to Equal Weight from Overweight because they no longer view LOFT as a compelling reason to invest in the company.
  
• Citigroup downgraded Hershey (NYSE: HSY) to Hold from Buy on valuation.
  
• KeyBanc dropped Lennox (NYSE: LII) to Hold from Buy on valuation.

Analyst initiations:

• Coverage of Hershey was assumed with a Sell by Stifel, which cited valuation for its rating.
• FARO Technology (NASDAQ: FARO) was initiated by Needham with a Buy rating.
• Leerink Swann resumed coverage of Cardionet (NASDAQ: BEAT) with an Outperform, as the firm predicts that the company's technolgoy will enable it to grow substantially.

MOST NOTEWORTHY: MedicNova, Transocean and Lennox were today's noteworthy initiations:

• Rodman & Renshaw is positive on MedicNova's (NASDAQ:MNOV) two primary products in development: MN-221, for the treatment of severe asthma and MN-166, an oral treatment for multiple sclerosis. The firm is also positive on MNOV's valuation; shares were initiated with an Outperform rating and $9 target.
  
• Transocean (NYSE:RIG) is UBS's Top Pick as they believe it is the primary beneficiary of rising deepwater dayrates. Shares were assumed with a Buy rating and $201 target.
  
• Suntrust initiated Lennox (NYSE:LII) with a Neutral rating and cites near-term visibility.

OTHER INITIATIONS:

• Dean Foods (NYSE:DF) was initiated with an Outperform rating and $29 target.
  
• Goldman started Parker-Hannifin (NYSE:PH) with a Neutral rating and $92 target.
  
• UBS assumed Hercules Offshore (NASDAQ:HERO) and Pride International (NYSE:PDE) with Neutral ratings and targets of $35 and $49, respectively.