Analyst Upgrades

• Stifel Financial (SF) and CVR Energy (CVI) to buy from neutral and Principal Financial (PFG) to conviction buy from buy at Goldman.
• Suntech (STP) to buy from hold at Auriga.
• Internap (INAP) to outperform from sector perform at RBC Capital.
• Andersons (ANDE) to buy from hold at BB&T.

Analyst upgrades:

• Baird upgraded Adtran (NASDAQ: ADTN) to Outperform from Neutral based on valuation, new product cycles, and confidence in 2H08 results.
  
• Morgan Stanley upgraded shares of Repsol (NYSE: REP) to Overweight from Equal Weight as they believe the potential sale to Sacyr Vallehermoso SA could lead to a restructuring.
  
• Stanford lifted National Oilwell Varco (NYSE: NOV) to Buy from Hold citing valuation. In addition, the firm, which set a target of $70, thinks most of the drop in commodity prices is now over.
• Ryanair (NASDAQ: RYAAY) was raised to Hold from Sell at Societe Generale.
  
• Ann Taylor (NYSE: ANN) was upgraded at Piper to Neutral from Sell.
  
• Goldman added Illinois Tool Works (NYSE: ITW) to the Conviction Buy List.

Analyst downgrades:

• Argus downgraded shares of Constellation Energy (NYSE: CEG) to Hold from Buy post-close given the volatility in the stock as they can no longer recommend CEG until concerns over its capital and liquidity are resolved. Shares were also downgraded to Hold from Buy at Citigroup.
  
• Collins Stewart downgraded Lloyds TSB Group (NYSE: LYG) to Hold from Buy following the acquisition of HBOS (OTC: HBOOY) as they expect short-term weakness in the stock.

MOST NOTEWORTHY: The airline sector, Siemens and Internap were today's noteworthy downgrades:

• Lehman downgraded the airline sector to Neutral from Positive, citing higher fuel costs and the weakening economy. AirTran (NYSE: AAI) and U.S. Airways (NYSE: LCC) were downgraded to Equal Weight from Overweight. UBS said it can no longer recommend airline stocks due to weakening economy, high fuel prices, and less likely industry consolidation. The firm downgraded Continental Airlines (NYSE: CAL), Delta Air Lines (NYSE: DAL), Northwest Airlines (NYSE: NWA) and U.S. Airways to Neutral from Buy.
  
• Goldman removed shares of Siemens (NYSE: SI) from their Conviction Buy List as they believe the company may book additional charges of $1.2B this year.
  
• Jefferies cut Internap (NASDAQ: INAP) to Underperform from Buy as they believe the 10-K filing delay and revenue quality questions reduce visibility into the health of the business.

OTHER DOWNGRADES:

• Wachovia lowered Amgen (NASDAQ: AMGN) to Market Perform from Outperform.
  
• SI International (NASDAQ: SINT) was downgraded to Neutral from Outperform at Cowen.
  
• Citigroup cut Assured Guaranty (NYSE: AGO) to Hold from Buy.

MOST NOTEWORTHY: Priceline.com, Monster and Internap were today's noteworthy downgrades:

• Susquehanna downgraded Priceline.com (NASDAQ: PCLN) to Neutral from Positive as they believe upside may be difficult given the macro environment, competition, and currency headwinds.
  
• JP Morgan lowered Monster (NASDAQ: MNST) to Neutral from Overweight following the company's expectations for higher 1Q08 operating expenses.
  
• Internap (NASDAQ: INAP) was downgraded by Merriman to Neutral from Buy as they believe upside will be limited until the company can complete its integration of the VitalStream CDN acquisition.

OTHER DOWNGRADES:

• JP Morgan cut Sara Lee (NYSE: SLE) and Kraft Foods (NYSE: KFT) to Neutral from Overweight.
  
• Volkswagen (OTC: VLKAY) was downgraded at WestLB to Add from Buy.
  
• Merrill downgraded Getty Realty (NYSE: GTY) to Sell from Neutral.

MOST NOTEWORTHY: Suntech Power, First Solar, Banco Santander, Internap and NetGear were today's noteworthy initiations:

• Merriman initiated shares of Suntech Power (NYSE: STP) with a Buy rating and believes the company is benefiting from strong worldwide demand for solar PV technology. The firm suggests a potential 12-month stock price range of $56-$64.
  
• Merriman also started shares of First Solar (NASDAQ: FSLR) with a Sell rating, as they believe the company's market is limited to ground-based systems because of its cadmium-based technology, which they feel could lead to environment concerns over time.
  
• Deutsche Bank resumed coverage of Banco Santander (NYSE: STD) with a Buy rating. The firm is positive on the bank's agreement with ABN Amro (NYSE: ABN) and feels the company has a lack of exposure to risky assets.
  
• Jefferies believes Internap (NASDAQ: INAP) is well-positioned with its suite of services to address a rapidly growing market, starting shares off with a Buy rating and $20 target.
  
• Nollenberger believes NetGear (NASDAQ: NTGR) provides a pure-play opportunity to capitalize on the global penetration of broadband connectivity. The firm resumed coverage with a Buy rating and $36 target.

OTHER INITIATIONS:

• ThinkEquity initiated Google (NASDAQ: GOOG) with a Buy rating and $800 target and Yahoo! (NASDAQ: YHOO) with an Accumulate rating.
  
• Banc of America initiated U.S. land drillers, including Grey Wolf (AMEX: GW), Nabors Industries (NYSE: NBR) and Patterson-UTI Energy (NASDAQ: PTEN) with Neutral ratings and Parker Drilling (NYSE: PKD) with a Buy rating.

MOST NOTEWORTHY: The U.S. media sector, oil services, MercadoLibre and Horsehead Holdings were today's noteworthy initiations:

• Credit Suisse initiated coverage of the U.S. media sector with a Market Weight rating, shares of The Walt Disney Company (NYSE: DIS) with an Outperform rating and shares of Time Warner Inc (NYSE: TWX) and Viacom Inc (NYSE: VIA.B) with Neutral ratings.
  
• Bernstein initiated coverage of the oil services sector with a Positive Bias rating. The firm initiated Weatherford International Ltd (NYSE: WFT) with an Outperform rating and $84 target and Halliburton Company (NYSE: HAL), Baker Hughes Incorporated (NYSE: BHI) and Schlumberger Limited (NYSE: SLB) with Market Perform ratings and a $44 target, $103 target and $96 target, respectively.
  
• MercadoLibre Inc (NASDAQ: MELI) was initiated by American Technology with a Buy rating and $45 target, as the firm believes the e-commerce growth opportunity in Latin America is still in its infancy. Shares were also started at Pacific Crest with an Outperform rating and $37 target, as the firm believes the company should benefit from strong secular growth and company-specific drivers. MercadoLibre was also initiated at JP Morgan with an Overweight rating and at Merrill Lynch with a Buy rating and $35 target.
  
• Friedman Billings expects Horsehead Holding Corp's (NASDAQ: ZINC) EBITDA to increase even in a declining commodity environment and believes the company is well positioned to gain market share. Shares were started with an Outperform rating and $27 target also added to the firm's Top Pick List.

OTHER INITIATIONS:

• Citigroup started shares of Companhia Vale do Rio Doce (NYSE: RIO) with a Buy rating and shares of StealthGas Inc (NASDAQ: GASS) with a Hold rating and $20 target.
  
• Roth Capital started shares of Internap Network Services Corporation (NASDAQ: INAP) with a Buy rating and $19 target.
  
• Raymond James initiated Atmel Corporation (NASDAQ: ATML) with an Outperform rating and Argo Group Internaional Holdings Ltd (NASDAQ: AGII) with a Strong Buy rating.

MOST NOTEWORTHY: AstraZeneca (AZN), Ametek (AME), InterNAP Network Services (INAP) and Rosetta Genomics (ROSG) were today's noteworthy initiations:

• Cowen believes AstraZeneca (NYSE: AZN) faces challenges from patent expirations, patent challenges, high-risk pipeline and value creation from deals, and initiated shares with a Neutral rating.

• Ametek (NYSE: AME) was initiated at Friedman Billings with an Outperform rating and $44 target, as the firm believes AME has turned into a collection of niche-oriented high-value-added manufacturers of precision instrumentation, resulting in a high-margin, high-return business with above average growth.

• InterNAP (NASDAQ: INAP) was initiated at Thomas Weisel with an Overweight rating, as the firm is positive on INAP's unique service offerings, VitalSteam acquisition opportunities, high growth customers, and improving collocation and bandwidth demand fundamentals.

• Cantor expects Rosetta Genomics (NASDAQ: ROSG) to launch the world's first microRNA-based cancer diagnostic in the second-half of 2008 with a market of $200 million, and initiated shares with a Buy rating and $15 target.

OTHER INITIATIONS:

• Banc of America initiated shares of Spirit AeroSystems Holdings (NYSE: SPR) with a Buy rating and $42 target.

• Duke Energy (NYSE: DUK) was initiated with a Market Perform rating at BMO Capital.

• Merrill Lynch initiated shares of JMP Group (NYSE: JMP) with a Buy rating.

• UBS initiated shares of Itron (NASDAQ: ITRI) with a Neutral rating and $82 target.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).