Analyst upgrades:

• Jefferies upgraded Ansys (NASDAQ: ANSS) shares to Buy from Hold following the company's reduced guidance as it now believes estimates are much more achievable. Despite the upgrade, the firm lowered its target price to $25 from $29.
  
• Deutsche Bank upgraded shares of Signet Jewelers (NYSE: SIG) to Buy from Hold on expectations the company will benefit from a capacity reduction in U.S. jewelry retailing.
  
• Thomas Weisel upgraded Omnicare (NYSE: OCR) to Overweight from Market Weight citing improving fundamentals and misunderstandings regarding Obama's healthcare proposal.
• Verizon (VZ) was lifted to Outperform from Sector Perform at RBC Capital.
  
• The Inventure Group (NYSE: SNAK) was raised to Buy from Hold at Roth Capital.
  
• Chico's FAS (NYSE: CHS) was upgraded at Friedman Billings to Outperform from Market Perform.

Analyst downgrades:

• Stephens downgraded Wilbros Group (NYSE: WG) to Equal Weight from Overweight to reflect a lack of visibility into earnings and deterioration in the company's end markets. The firm lowered its target price to $9.
• Jefferies downgraded Limelight Networks (NASDAQ: LLNW) to Hold from Buy as it believes the company can not sustain profits or cash flow this year given its capex requirements. The firm lowered its target price to $3 from $4.
  
• Barclays cut SLM Corp (NYSE: SLM) to Equal Weight from Overweight following President Obama's proposal to eliminate Federal Family Education Loan Program.
• Synta Pharma (NASDAQ: SNTA) was lowered to Hold from Buy at Roth Capital and to Sector Perform from Outperform at RBC Capital.
  
• U.S. Cellular (NYSE: USM) was downgraded at Baird to Underperform from Neutral.
  
• Paychex (NASDAQ: PAYX) was downgraded to Sell from Neutral at Goldman.

Analyst initiations:

• ThinkEquity expects Emulex (NYSE: ELX) to generate positive FCF in 2010 and views valuation as attractive. Shares were initiated with a Buy rating and $7 target.
  
• Lazard Capital initiated Constant Contact (NASDAQ: CTCT) with a Buy rating and $19 target. The firm believes the company is well positioned in the Software as a Service category of E-mail Marketing.
• Morgan Stanley assumed Dollar Tree (NASDAQ: DLTR) with an Overweight rating and $45 target and Family Dollar (NYSE: FDO) with an Equal Weight rating.
  
• Regal Entertainment (NYSE: RGC) was started at Barclays with an Overweight rating and $14 target.

This post is part of a special annual report -- Top Stock Picks '09 -- in which TheStockAdvisors.com asked 75 leading newsletter advisors to select their favorite investment for the new year.

"My top pick is US Cellular 8.75% Senior Notes (NYSE: UZG)," says Carla Pasternak. In her income-oriented advisory service, High-Yield Investing, she says, "The best thing about them? They are bonds, but trade like stocks."

Pasternak explains, "Their total interest payments of $2.1875 a year dished out quarterly are legal obligations, not discretionary payments like stock dividends.

"As senior notes, too, investors can rest assured that UZG's interest payments have a prior claim on the company's assets, ahead of any common or preferred share dividends, if the issuing company were to run into trouble.

"Not that I consider it likely United States Cellular (NYSE: USM), America's sixth-largest wireless firm and the name behind these bonds, is any danger.

MOST NOTEWORTHY: RadioShack Corp (RSH), Visual Sciences (VSCN), Alcan (AL), U.S. Celluar (USM) and Westwood One (WON) were today's noteworthy downgrades:

• Banc of America downgraded shares of RadioShack (NYSE: RSH) to Sell from Neutral and lowered their target to $18 from $26 as they believe cuts to labor costs and advertising expenses will make it more difficult to overcome declining wireless trends.

• Friedman Billings cut Visual Sciences (NASDAQ: VSCN) to Market Perform from Outperform on valuation. Citigroup downgraded Alcan to Hold from buy on the acquisition news.

• Soleil cut U.S. Celluar (AMEX: USM) to Sell from Hold on valuation.

• Westwood One (NYSE: WON) was downgraded to Sell from Hold at Citigroup based on management distractions and weak fundamentals...

OTHER DOWNGRADES:

• Cowen removed ImClone Systems (NASDAQ: IMCL) from its Focus List, as the firm believes Erbitux is now more in line with consensus but said financials remain uninspiring.

• Merrill cut Allstate (NYSE: ALL) and Black & Decker (NYSE: BDK) to Neutral from Buy.

• USB downgraded Frontline (NYSE: FRO) to Reduce from Neutral.

• Matrix cut Thor Industries (NYSE: THO) to Sell from Strong Buy.

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