Analyst upgrades:

• Royal Bank of Scotland upgraded shares of Vodafone (NYSE: VOD) to Buy from Hold to reflect the company's dividend yield.
  
• JMP Securities expects HFF Inc. (NYSE: HF) to benefit from increased U.S. commercial real estate sales and mortgage volumes. Shares were upgraded to Outperform from Market Perform. The firm has a $5 target on shares.
  
• Oppenheimer upgraded Church & Dwight (NYSE: CHD) to Outperform from Perform as it believes Church & Dwight's value-oriented portfolio should continue to benefit from the consumer trade-down and that concerns over distribution are overblown. The firm set a $62 price on shares.
• Regeneron (NASDAQ: REGN) was upgraded to Buy from Neutral at Piper Jaffray.
  
• Burlington Northern (NYSE: BNI) was raised to Buy from Neutral at Goldman.
• AMB Property (NYSE: AMB) was lifted to Neutral from Underperform at Banc of America/Merrill.

Analyst upgrades:

• Thomas Weisel upgraded SanDisk (NASDAQ:SNDK) to Market Weight from Underweight. Thomas Weisel said they are less negative on the outlook for memory industry dynamics but they do expect SanDisk shares to be range bound.
  
• Citigroup upgraded shares of Hershey (NYSE:HSY) to Buy from Hold as they believe Hershey is benefiting from increased advertising spending and the consumer trade-down to less expensive chocolate. The firm maintains a $39 target on the stock.
  
• Deutsche Bank upgraded Best Buy (NYSE:BBY) to Buy from Holdas they believe the company will be a beneficiary from the Circuit City liquidation.
• Ericsson (NASDAQ:ERIC) was upgraded to Neutral from Sell at Goldman.
  
• Advance Auto Parts (NYSE:AAP) and Virgin Media (NASDAQ:VMED) were raised to Overweight from Neutral at JP Morgan.
  
• NewMarket (NYSE:NEU) was upgraded at KeyBanc to Buy from Hold.

Analyst downgrades:

• Citigroup downgraded Kellogg (NYSE:K) to Hold from Buy as they believe the company's U.S. trends are decelerating and that FX trends will have a negative impact. The firm lowered their target price to $47 from $58.
  
• Jefferies downgraded Cerner (NASDAQ:CERN) to Hold from Buy following Eclipsys' (NASDAQ:ECLP) negative pre-announcement as they believe both companies are suffering from a downturn in hospital spending. Jefferies lowered their target on Cerner to $38 from $51.
  
• Oppenheimer cut Amdocs (DOX) to Perform from Outperform following the weak Q1 results citing lack of near-term catalysts and the macroeconomic slowdown.
• Eclipsys (NASDAQ:ECLP)was downgraded to Underperform from Buy at Jefferies and to Neutral from Buy at Piper Jaffray.
  
• PetSmart (NASDAQ:PETM) was downgraded to Hold from Buy at Deutsche Bank.
  
• Fulton Financial (NASDAQ:FULT) was lowered to Underperform from Market Perform at Keefe Bruyette.

Analyst initiations:

• Wunderlich initiated Republic Services (NYSE:RSG) with a Buy rating and $30 target and believes the company should enjoy sustainable pricing leverage following the merger with Waste Management.
  
• RBC Capital initiated Elan Corp (NYSE:ELN) with an Underperform rating and $4 target based on Tysabri uncertainty, bapineuzumab clinical risk, MS competition, and debt overhang.
  
• Oppenheimer expects Ligand Pharmaceuticals (NASDAQ:LGND) to become an aggressive acquirer of financially distressed biotech companies with the completion of the acquisition of Pharmacopeia. Shares were assumed with an Outperform rating and $5 target.
• Zebra Tech (NASDAQ:ZBRA) was initiated with a Neutral rating and $25 target at JP Morgan.
  
• Activision (NASDAQ:ATVI) was reinitiated at Friedman Billings with an Outperform rating and $14 target.
  
• Ameren (NYSE:AEE) was assumed with a Hold rating at Jesup & Lamont.

The publicly traded debt of a large number of companies are traded at such low volumes that investors often must be patient when looking to add a quality name to their corporate bond portfolio.

Such is the case with NewMarket Corp. (NYSE: NEU).

With just over $200 million in long-term debt, there is only minimal trading in the security. The most recent trades have been at levels that should attract interest from investors. At $77.25, the 7.125% bonds maturing in 2016 are yielding over 11.5% to maturity, and 18.2% to the 2011 call at 103.563.

NewMarket is a Richmond, Va., based holding company with primary business in formulated packaging of lubricants and fuel additives.

Among the holdings of the company are Afton Chemical, Ethyl Corporation, NewMarket Services and NewMarket Development Company.

The company's chemical related products include HiTEC, GREENBURN, TecGARD, BioTEC, Axcel and MMT. Each of these labels is sold primarily through service stations and auto parts dealers. And NewMarket Development owns 64 acres of property in downtown Richmond.

TheStreet.com's Jim Cramer says the only action in the sector is that the rumor mill is spinning overtime.

There are tons of ridiculous stories that can be written in the Naked City. Notice that every day we are blessed with a story about how there are three private-equity firms examining Lehman Brothers (NYSE: LEH) (Cramer's Take) and Neuberger Berman (NYSE: NEU) (Cramer's Take). I think I have read that story a dozen times now.

You can list them, too: Blackstone (NYSE: BX) (Cramer's Take), KKR (NYSE: KFN) (Cramer's Take), Apollo (NASDAQ: AINV) (Cramer's Take), maybe Cerberus. What are they going to do, deny it? "No, we are not looking at it?" Their investors would love that: "Well what the heck are they doing with our money?" would be the reaction of investors if they issued denials. I predict weeks more of phantom tire-kicking of Lehman by nonexistent private-equity firms.

How about private equity about to swarm over collateralized debt obligations? Usual cast of characters there. Right? Come on, those stories are a penny a dozen. Every day I read about them. But nobody, other than Lone Star, is doing anything, anything at all on this front. If there were buyers, you can bet that Lehman and AIG (NYSE: AIG) (Cramer's Take) wouldn't be in the woods, lost, hopeless, with tons of bad European paper.

MOST NOTEWORTHY: Enterprise Software Sector, NewMarket and Great Plans Energy were today's noteworthy initiations:

• Stanford believes Software companies could be better positioned to withstand an economic slowdown than most believe, but feels demand is positioned to slow in 2008. They are "somewhat cautious" on the sector and initiated coverage of Microsoft (NASDAQ:MSFT) and McAfee (NYSE:MFE) with Buy ratings and Symantec (NASDAQ:SYMC) with a Hold rating.
  
• Oppenheimer initiated NewMarket (NYSE:NEU) with an Outperform rating and $68 target, as they believes it is an underfollowed specialty chemical company with improving fundamentals and low investor expectations. They think the company's free cash flow could fuel large share buybacks and strategic acquisitions.
  
• Great Plains Energy (NYSE:GXP) was started with an Outperform rating at Wachovia, as they are positive on the company's strong rate base growth and valuation.

OTHER INITIATIONS:

• Time Warner Cable (NYSE:TWC) was initiated with a Neutral rating at Cowen.
  
• Nokia (NYSE:NOK) was initiated with an Above Average rating at Caris.
  
• Broadpoint started Take-Two (NASDAQ:TTWO) with a Buy rating and $20 target.

MOST NOTEWORTHY: Benihana Inc. was the sole noteworthy upgrade in today's minuscule list:

• Sanders Morris upgraded Benihana Inc (NASDAQ:BNHNA) to Strong Buy from Buy with a $34 target, citing limited downside and $30% potential upside to their favorite restaurant pick in 2007.

OTHER UPGRADES:

• Citing increasing demand for petroleum activities and valuation, Matrix USA upgraded NewMarket Corp (NYSE:NEU) to Strong Buy from Buy.

• Ferris, Baker Watts upgraded shares of Tollgrade Communications (NASDAQ:TLGD) to Buy from Neutral, with a $12 target, based on their belief that Tollgrade has improved its growth prospects by expanding its geographic reach, evolving its product offerings and adjusting its operating and overhead structure.

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