Analyst upgrades:

• Goldman added McDonald's (NYSE:MCD) to its Conviction Buy List as they believe the company will beat their earnings expectations over the next couple quarters. Note that Burger King (NYSE:BKC) was removed from the list.
  
• Baird upgraded Woodward Govenor (NASDAQ:WGOV) to Outperform from Neutral citing increased confident in its outlook following the better-than-expected Q1 report.
  
• Citigroup upgraded Harley-Davidson (NYSE:HOG) to Hold from Sell and removed shares from their Top Picks Live List as a Sell as they believe current expectations are very low following the recent weakness. Citigroup lowered their target price to $13 from $18.
• Ford (NYSE:F) and Lear (NYSE:LEA) were upgraded to Hold from Sell at Deutsche Bank.
  
• KT Corp (NYSE:KTC) was raised to Overweight from Neutral at HSBC.
  
• Ryanair (NASDAQ:RYAAY) was upgraded to Hold from Sell at Collins Stewart and to Buy from Neutral at UBS.

Analyst downgrades:

• Goldman removed Burger King (NYSE:BKC) from its Conviction Buy List citing recent share strength. Note that McDonald's (NYSE:MCD) was added to the list.
  
• Keefe Bruyette downgraded shares of Och-Ziff Capital (NYSE:OZM) to Market Perform from Outperform to reflect the company's near-term headwinds. The firm lowered their target to $5 from $6.50.
  
• Morgan Stanley downgraded Freeport-McMoRan (NYSE:FCX), Alcoa (NYSE:AA), and Century Aluminum (NASDAQ:CENX) to Equal Weight from Overweight as they believe industrial metals will be depressed through next year.
• Air France (Other OTC:AFLYY) was downgraded to Sell from Neutral at UBS.
  
• Wal-Mart (NYSE:WMT) was lowered to Neutral from Outperform at Credit Suisse.
  
• Radware (NASDAQ:RDWR) was cut at Argus to Hold from Buy.

Analyst initiations:

• Merriman initiated Suntech (NYSE:STP) with a Sell rating. The firm is concerned by the company's debt load and narrowing maturity and thinks further cost reduction in China could be a challenge. The firm believes a fair price target range is $3.50-$4.50 per share.
  
• JMP Securities views Google (NASDAQ:GOOG) as a long-term "must buy" given its dominant market position, strong balance sheet, and low valuation. Shares were initiated with an Outperform rating and $400 target.
  
• Auriga started Micron (NYSE:MU) with a Buy rating and $5 target. The firm expects DRAM oversupply to ease in the second half of 2009 and believes Micron will not burn significant cash this year.
• Qualcomm (NASDAQ:QCOM) was initiated at Morgan Stanley with an Equal Weight rating and $41 target.
  
• Core Laboratories (NYSE:CLB) was initiated with a Buy rating and $80 target at Wunderlich.
  
• Mylan (NASDAQ:MYL) was started with a Buy rating and $16 target at Citigroup.

Analyst upgrades:

• Oppenheimer assumed coverage of Sohu (NASDAQ:SOHU) and upgraded shares to Outperform from Perform as they believe the company is better positioned in an uncertain economy. The firm thinks strength in online games could lead to EPS upside and raised their target to $61 from $53.
  
• Allegiant (NASDAQ:ALGT) was upgraded to Buy from hold at Jesup & Lamont on valuation following the recent weakness.
  
• Suntrust upgraded Prosperity Bancshares (NASDAQ:PRSP) to Buy from Neutral based on valuation. The firm maintains a $30 target on shares.
• LaBranche (NYSE:LAB) was upgraded to Buy from Sell at Goldman.
  
• AU Optronics (NYSE:AUO) was raised to Overweight from Neutral at HSBC.
• Core Laboratories (NYSE:CLB) was upgraded to Overweight from Neutral at JP Morgan.

Analyst downgrades:

• Jefferies downgraded shares of BPZ Resources (AMEX:BPZ) to Underperform from Hold as they believe the decline in oil prices and the uncertain credit markets has placed considerable pressure on the company's operations in northwest Peru. The firm maintains a $5 target on the stock.
  
• UBS downgraded StatoilHydro (NYSE:STO) and Repsol SA (NYSE:REP) to Neutral from Buy as they expect 2009 to be a difficult year for European oil and gas companies.
  
• Bernstein downgraded Heinz (NYSE:HNZ) to Market Perform from Outperform and lowered their target to $42 from $62 citing foreign exchange impact and commodity pressures.
• Blackstone Group (NYSE:BX) was downgraded to Underweight from Overweight at Barclays.
  
• Siemens (NYSE:SI) was lowered to Neutral from Buy at Banc of America/Merrill.
  
• Pride International (NYSE:PDE) was cut to Underweight from Neutral at JP Morgan.

Analyst initiations:

• Kaufman Bros. believes GT Solar's (NASDAQ:SOLR) equipment orders are at a bottom and that shares are undervalued. Shares were initiated with a Buy rating and $7 target.
  
• Jefferies assumed L-1 Identity (NYSE:ID) with a Buy rating and $11 target. The firm believes concerns over the company's sensitivity to government budget priorities and elevated levels of debt are overdone.
  
• JP Morgan (NYSE:JPM) was started at Keefe Bruyette with a Market Perform rating and $30 target. Keefe Bruyette sees limited catalysts for the stock as they expect credit headwinds and subdued investment banking revenues to persist over the near-term.
• Legg Mason (NYSE:LM) and T. Rowe Price (NASDAQ:TROW) were initiated with an Equal Weight rating at Barclays.
  
• Electronic Arts (NASDAQ:ERTS) was initiated at Janney Mongtomery with a Neutral rating.
  
• Friedman Billings reinitiated U.S. Bancorp (NYSE:USB) with an Underperform rating and $17 target.

Analyst upgrades:

• JP Morgan upgraded Altria (NYSE: MO), citing the company's 25% cash return to shareholders by 2010 and its market leadership.
  
• RBC Capital upgraded Core Laboratories (NYSE: CLB) based on its solid balance sheet and liquidity, strong market positions, and technology-driven products.
  
• RBC Capital believes Schlumberger's (NYSE: SLB) earnings will decrease the least vs. its peers through 2010 and notes its breadth of products/services.
• Tellabs (NASDAQ: TLAB) upgraded to Overweight from Equal Weight at Barclays.
  
• Bally Tech (NYSE: BYI) upgraded to Buy from Neutral at Goldman.
  
• Best Buy (NYSE: BBY) upgraded to Buy from Neutral at Piper Jaffray.

Analyst downgrades:

• Goldman downgraded Apple (NASDAQ: AAPL) citing consumer spending concerns and valuation.
  
• Merrill downgraded JP Morgan (NYSE: JPM) citing expectations for credit costs to get worse in the US.
  
• Wachovia downgraded a handful of names, including Chesapeake (NYSE: CHK), in the Exploration & Production space as they believe natural gas prices have more downside in order to balance supply/demand fundamentals.

Analyst upgrades:

• Keefe Bruyette upgraded IberiaBank (NASDAQ: IBKC) to Market Perform from Underperform following the company's capital raise, which the firm believes strengthens IberiaBank's balance sheet. Baird upgraded IberiaBank to Outperform from Neutral based on valuation following weakness related to the $100M capital raise.
  
• Pali upgraded shares of Urban Outfitters (NASDAQ: URBN) to Neutral from Sell on valuation as they believe the company's comp slowdown is largely priced in at current levels.
  
• Morgan Keegan upgraded Casey's General Store (NASDAQ: CASY) to Outperform from Market Perform based on valuation, healthy SSS, and easing comps.
• Cabot OIl & Gas (NYSE: COG) and Royal Dutch Shell (NYSE: RDS.A) were added to Goldman's Conviction Buy List.
  
• American Capital (NASDAQ: ACAS) was raised to Market Perform from Underperform at Friedman Billings.
  
• CIBC lifted Manulife (NYSE: MFC) to Sector Outperformer from Sector Performer.

Analyst downgrades:

• Goldman downgraded Caterpillar (NYSE: CAT) to Sell from Neutral based on expectations for reduced capex spending by mining and oil & gas companies and the impact from the credit crunch.
  
• Deutsche Bank downgraded auto companies and suppliers as they believe the failed government bailout increases risks. Ford (NYSE: F), American Axle (NYSE: AXL), Magna International (NYSE: MGA) and Lear (NYSE: LEA) were downgraded to Sell from Hold.
  
• SAP (NYSE: SAP) was cut to Hold from Buy at Jefferies to reflect the "deteriorating" corporate IT spend environment.
• Waters (NYSE: WAT) was downgraded to Neutral from Overweight at JP Morgan.
  
• Agilent (NYSE: A) was lowered to Equal Weight from Overweight at Barclays; the firm also downgraded Varian (NASDAQ: VARI) to Underweight from Equal Weight.

Analyst initiations:

• Jefferies believes Core Laboratories (NYSE: CLB) is well positioned to benefit from the increasing need for reservoir optimization services. Shares were initiated with a Buy rating and $70 target.
  
• Deutsche Bank initiated Capital One (NYSE: COF) with a Sell rating and $24 target, citing the difficult economic environment and the potential for higher credit losses.
  
• Soleil started Hexcel (NYSE: HXL) with a Buy rating and $10 target and expects the company's military business to remain strong through 2010.
• On Semiconductor (NASDAQ: ONNN) was assumed with a Neutral rating and $3.80 target at UBS.
  
• Cbeyond (NASDAQ: CBEY) was initiated at Oppenheimer with a Perform rating.
• Brocade (NASDAQ: BRCD) was started with a Neutral rating at Piper Jaffray.

In an era of elevated energy prices, one argument noted in this space before is that oil and oil/natural gas service companies are likely to remain promising plays for the foreseeable future, barring the discovery of a cheap, widely-available, alternative energy. With this in mind, Core Laboratories is worth a review.

Core Labs (NYSE: CLB) analyzes petroleum reservoir rock and fluids, helping oil companies determine how much oil or gas exists in their reservoirs and how quickly it can be extracted.

Analysts see +20% revenue growth for CLB in 2008 on strong oil/gas well analysis revenue. Analysts also like CLB's ramping hydraulic fracturing / field flooding and reservoir management services. The Reuters F2007/F2008 EPS consensus estimates for CLB are $4.86/$6.07

Further, with global oil/gas exploration activity expected to increase 20-35% in 2008 after +20% increases in 2007 and 2006, analysts believe Core will be able to continue to increase its business at healthy rates. (Oil exploration budgets are likely to decline only if oil prices remain below $50 per barrel for a sustained period.)

After last week's pick of SunPower, a solar energy company, it may seem strange that I'm now talking about fossil fuels. But there are several different ways to profit from the high price of oil -- and exploring other energy sources is only one of them.

Core Laboratories NV (NYSE:CLB) is one of the most innovative companies working today in the field of "reservoir description, production enhancement and reservoir management products and services to the oil and gas industry." In plain English, that means Core Labs helps oil and gas companies find new deposits of raw fuels, and get more fuel more efficiently from the ones they already have. And in a market where oil is fast becoming almost worth its weight in gold, having a corner on the market of making oil companies more efficient is almost like having a license to print money.

It's not surprising, then, that Core Lab has had 10 straight quarters of quarterly revenue highs, with a stock price to match. According to recent reports, the company showed a 41% net income gain in the 3rd quarter, and is estimating that full year revenues should be up 15% over 2006 (and there's anticipation of a 10-13% revenue growth in 2008 as well.) And the analysts agree -- FBR is estimating that the price could jump as much as 40% in the next 12 months, making it, in their opinion, a "top pick."

Fossil fuels, especially oil, always hold some degree of risk -- especially when oil is often found in volatile regions. But Core Lab has the advantage of operating out of more than 50 countries (the company is primarily based in The Netherlands), which means that some of that risk is mitigated by their ability to work in and around all of the world's major oil markets. There is also a concern that if the price of oil drops drastically, oil companies may be less eager to outsource this sort of analysis -- or they might be even more desperate for the innovations that Core Lab provides. For the moment, however, all signs point to this stock -- and this segment of the energy market -- continuing to ride high.

Type of Stock: Provides production enhancement and management services to the oil and gas industry.

Price Target: I'd keep an eye on this after a jump last week – if you can get it under $135, I'd grab it.

Hilary Kramer,author of the newly released Ahead of the Curve, is a financial editor and money coach for AOL and an authority on investing.

TheStreet.com's Jim Cramer says that as oil goes higher, these stocks will have even more room to run.

Name me three tech stocks that have increased more than 100% in the last year that are still cheap.

Try it! Think you can't?

I have some news for you. I have three that are still selling well under twice their growth rate that have more room to run and simply aren't done, as crazy as that seems: Oceaneering International Inc. (NYSE: OII) (Cramer's Take), FMC Technologies (NYSE: FTI) (Cramer's Take) and Core Labs (NYSE: CLB) (Cramer's Take).

I know. These are oil companies. They are not semis or software or hardware. They are technical services companies that allow companies to recoup marginal oil.

They are the ultimate tech plays on $80 oil. They are worth their weight in black gold.

MOST NOTEWORTHY: ValueClick, Inc (VCLK), aQuantive, Inc (AQNT), Cigna Corp (CI), Warner Music Group (WMG), Clear Channel Communications, Inc (CCU) and Medtronic, Inc (MDT) were today's more notable downgrades:

• Baird cut ValueClick Inc (NASDAQ: VCLK) to Neutral from Outperform, citing the FTC inquiry.

• aQuantive (NASDAQ: AQNT) was downgraded to Sell from Buy after the company was acquired by Microsoft (MSFT) and because aQuantive no longer trades on fundamentals. Kaufman and Gabelli also cut aQuantive to Hold from Buy.

• Cigna (NYSE: CI) was downgraded at Prudential to Neutral from Overweight on valuation.

• Warner Music Group's (NYSE: WMG) downgrade to Sell from Neutral at Pali Research was based on the lower industry outlook, which Pali believes revenues are likely to fall at least 10% for the industry in 2007, along with the company's release schedule.

• Bear Stearns downgraded Clear Channel Communications (NYSE: CCU) to Peer Perform from Outperform on the acceptance of the higher bid.

• Medtronic Inc (NYSE: MDT) was downgraded to Underweight from Equal Weight at Morgan Stanley...

OTHER DOWNGRADES:

• Georgia Gulf Corp (NYSE: GGC) was downgraded to Sell from Hold at Matrix USA.

• Stifel cut Core Laboratories (NYSE: CLB) to Hold from Buy.

• UBS downgraded Intuit Inc (NASDAQ: INTU) to Neutral from Buy.

• Occidental Petroleum Corp (NYSE: OXY) was removed from Goldman's Conviction Buy list.

• Friedman Billings downgraded downgraded CapitalSource, Inc (NYSE: CSE) and Countrywide Financial Corp (NYSE: CFC) to Market Perform from Outperform.

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