Analyst upgrades:

• Citigroup upgraded Adtran (NASDAQ: ADTN) to Buy from Hold on expectations the company will benefit from the broadband Stimulus funds.
• Morgan Stanley upgraded Continental Airlines (NYSE: CAL) to Overweight from Equal Weight based on relative valuation and views the company as a "survivor." Additionally, the analyst lowered 2009 industry estimates but believes it is the last cut for the year and is incrementally more positive on the sector.
• Morgan Stanley also upgraded EXFO Electro-Optical (NASDAQ: EXFO) to Overweight from Market Weight based on valuation.
• Tata Motors (NYSE: TTM) was upgraded to Buy from Hold at Deutsche Bank.
• Ascent Solar (NASDAQ: ASTI) was upgraded to Neutral from Underweight at JP Morgan.
• Mechel Steel (NYSE: MTL) was upgraded to Neutral from Underperform at Credit Suisse.

Former Vice President Al Gore is doing quite nicely staying out of the current political fray.

Generation Investment Management Ltd., which he co-founded with ex-Goldman Sachs Group (NYSE: GS) banker David Blood in 2004, attracted nearly $5 billion to its main Global Equity Fund and is probably restricting inflows into the fund next month, according to Bloomberg News.

The fund has some pretty high ideals according to its Web site: "We focus on the economic, environmental, social, and governance risks and opportunities that can materially affect a company's ability to sustain profitability and deliver returns. Our research plays an important role in forming our views on the quality of the business, the quality of management, and valuation."

So how does that translate in the real world? Al Gore isn't providing performance details, according to the Bloomberg story. It's kind of weird for Gore to be so mum considering that its biggest holding Novo Nordisk (NYSE: NVO) is up more than 60% over the past year in U.S. trading.

MOST NOTEWORTHY: China Petroleum & Chemical, Syniverse and Allegheny Tech were today's noteworthy upgrades:

• Deutsche Bank upgraded China Petroleum & Chemical Corporation (NYSE: SNP) to Buy from Hold on valuation following the recent sell-off.
• ThinkEquity upgraded Syniverse Holdings Inc (NYSE: SVR) to Buy from Accumulate citing growth from further price reductions and adoption of new technologies that will drive transaction volumes.
• Allegheny Technologies Incorporated (NYSE: ATI) was raised to Buy from Neutral at Goldman.The firm upgraded Allegheny based on valuation, low stainless steel inventories, and nickel price stabilization.

OTHER UPGRADES:

• Napster Inc (NASDAQ: NAPS) was upgraded to Outperform from Peer Perform at Bear Stearns.
• Goldman raised Raytheon Company (NYSE: RTN) to Neutral from Sell.
• Johnson Controls Inc (NYSE: JCI) was upgrade to Buy from Add at Calyon.

MOST NOTEWORTHY: Statoil (STO), BG Group (BRG), Repsol (REP), Flow International (FLOW) and the refining sector were today's more noteworthy downgrades:

• Citigroup cut Statoil (NYSE: STO), BG Group (NYSE: BRG) and Repsol SA (NYSE: REP) to Sell from Hold due to valuation and the difficult operating environment.

• Matrix USA downgraded Flow International (NASDAQ: FLOW) to Strong Sell from Hold, citing weak demand from Asian customers that led to slowing sales growth.

• Bernstein downgraded the refining sector to Underperform and refiners Sunoco (NYSE: SUN) and Valero Energy (NYSE: VLO) to Underperform from Market Perform...

OTHER DOWNGRADES:

• Canadian Pacific (NYSE: CP) was cut to Neutral from Outperform at Credit Suisse; RBC Capital downgraded CP shares to Sector Perform from Outperform.

• Goldman downgraded Taiwan Semi (NYSE: TSM) to Neutral from Buy.

• Buckingham lowered Johnson Controls (NYSE: JCI) to Accumulate from Buy.

• Credit Suisse downgraded Cardinal Health (NYSE: CAH) to Neutral from Outperform.

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

MOST NOTEWORTHY: Oil and gas services companies, mining companies and Moody's Corporation (NYSE: MCO) were today's noteworthy upgrades:

• Morgan Keegan upgraded Natural Gas Services Group Inc (AMEX: NGS), Basic Energy Services Inc (NYSE: BAS) and Complete Production Services Inc (NYSE: CPX) to Outperform from Market Perform and Patterson-UTI Energy Inc (NASDAQ: PTEN) to Market Perform from Underperform, as the firm has a bullish outlook for drilling activity in the back half of 2007 and into 2008.
• JP Morgan upgraded shares of both Compania de Minas Buenaventu (NYSE: BVN) and Goldcorp Inc (NYSE: GG) to Overweight from Neutral on valuation.
• Moody's was upgraded to Overweight from Equal Weight at Morgan Stanley, citing increased confidence in revenue outlook and growth drivers.

OTHER UPGRADES:

• Inverness Medical Innovations Inc (AMEX: IMA) was upgraded to Buy from Hold at Stifel Nicolaus.
• Credit Suisse upgraded shares of Johnson Controls Inc (NYSE: JCI) to Outperform from Neutral, citing growth outlook in the company's building efficiency business.
• Allianz SE (NYSE: AZ) was upgraded to Buy from Add at WestLB on valuation and the company's strong Q1 results.

MOST NOTEWORTHY: The automotive sector was today's most noteworthy initiation:

• Prudential initiated the automotive manufacturers industry and automotive retail industry with Favorable ratings and the automotive parts and equipment industry with an Unfavorable rating. The firm initiated coverage on following stocks:
  
• Overweight-rated names included Autoliv Inc (NYSE: ALV), Group 1 Automotive, Inc (NYSE: GPI), Honda Motor Co, Ltd (NYSE: HMC), Johnson Controls, Inc (NYSE: JCI), Sonic Automotive, Inc (NYSE: SAH), & Toyota Motor Corp (NYSE: TM).
  
• Neutral Weight-rated names included AutoNation, Inc (NYSE: AN), DaimlerChrysler (NYSE: DCX), Magna International Inc (NYSE: MGA) and United Auto Group, Inc (NYSE: UAG).
  
• Underweight-rated names included Ford Motor Co (NYSE: F), General Motors Corp (NYSE: GM) and Gentex Corp (NASDAQ: GNTX).

OTHER INITIATIONS:

• Bernstein initiated JPMorgan Chase & Co (NYSE: JPM) with a Market Perform rating and $54 target.

• Lehman started Time Warner Cable Inc (NYSE: TWC) with a Neutral rating.

• Merriman initiated shares of Progressive Gaming International Corp (NASDAQ: PGIC) with a Buy rating, as the firm believes it is on the cusp of gaining meaningful market share of casino floors through its technologies and now is the time to get involved in shares.

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

MOST NOTEWORTHY: Nokia (NOK) and selected restaurants topped today's extensive list of downgrades:

• Due to slowing in the wireless sector, Oppenheimer downgraded shares of Nokia Corp. (NYSE:NOK) to Neutral from Buy, following Texas Instruments' (NYSE:TXN) lowered guidance;
• Citing valuations and a deteriorating outlook, Buckingham downgraded shares of Darden Restaurants Inc (NYSE:DRI) and Wendy's Inernational Inc. (NYSE:WEN) to Neutral from Accumulate, as well as Yum! Brands Inc. (NYSE:YUM) and Jack in the Box Inc. (NYSE:JBX) to Underperform from Neutral.

OTHER DOWNGRADES:

• JP Morgan downgraded Micron Technology Inc. (NYSE:MU) to Neutral from Overweight based on concerns of growing inventory levels and a weaker-than-expected flash market in the first half of 2007.
• Citigroup Inc. (NYSE:C) was removed from Sandler's Focus List.
• Calyon downgraded Johnson Controls Inc. (NYSE:JCI) to Neutral from Buy with an $85 target, citing valuation and the weakening economy.
• RBC Capital Markets downgraded Alcoa Inc. (NYSE:AA) to Underperform from Sector Perform on valuation.

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