Analyst upgrades

• Wells Fargo upgraded Boeing (BA) to outperform from market perform. The firm is more confident about the company's earnings growth going forward.
• Oppenheimer upgraded H&R Block (HRB) to outperform from perform on expectations the company will improve performance in 2011. The firm has a $22 price target for shares.
• Deutsche Bank upgraded SunTrust (STI) to buy from hold to reflect valuation and expectations the company's credit will improve. The firm raised its target for shares to $34 from $29.
• Children's Place (PLCE) was upgraded to overweight from neutral at JPMorgan.
• Taubman Centers (TCO) was upgraded to neutral from sell at UBS.
• Cavium Networks (CAVM) was upgraded to outperform from neutral at Cowen.

Analyst Upgrades

• Jefferies upgraded St. Jude (STJ) to buy from hold and raised its target to $49 from $39. The firm cites valuation and the positive impact from the Boston Scientific (BSX) ICD recall for the upgrade. Shares were also upgraded to neutral from sell at Goldman, as the firm sees upside for shares into Q1 results.
• RBC Capital upgraded EMC Corp. (EMC) to outperform from sector perform and raised its target to $22 from $21. The firm upgraded shares based on valuation and believes the company can meet or modestly beat March quarter expectations.
• Auriga upgraded MetroPCS (PCS) to buy from hold as it believes customer migration away from postpaid to prepaid may be accelerating. The firm raised its target for shares to $9 from $7.
• Caterpillar (CAT) was raised to outperform from neutral at Baird.
• Best Buy (BBY) was upgraded to market perform from underperform at FBR Capital.
• Expedia (EXPE) was upgraded to overweight from neutral at Piper Jaffray.

Analyst upgrades:

• Jefferies upgraded CME Group (CME) to Buy from Hold and has a $330 target on the stock. The firm believes increased regulatory concerns have created a buying opportunity and notes that CME Group's fundamentals are stable-to-improving.
• Susquehanna upgraded Priceline.com (PCLN) to Positive from Neutral and has a $230 target on the stock. The firm believes Priceline.com likely outperformed expectations in Q4.
• Citigroup upgraded AutoZone (AZO) to Buy from Hold citing an attractive valuation, favorable industry trends, and the potential for margin expansion. The firm raised its target price on shares to $188 from $176.
• Genzyme (GENZ) was raised to Sell from Conviction Sell at Goldman.
• Disney (DIS) was upgraded to Neutral from Underweight at JP Morgan.
• Exxon Mobil (XOM) was upgraded at Collins Stewart to Buy from Hold.

MOST NOTEWORTHY: iRobot, Felcor Lodging and Office Max were today's noteworthy initiations:

• Stanford initiated iRobot (NASDAQ: IRBT) with a Buy rating and $18 target and believes better-than-expected military robot sales will allow the company to beat 2008 consensus estimates.
  
• Felcor Lodging (NYSE: FCH) was initiated at Keefe Bruyette with a Market Perform rating and $12.50 target. The firm believes material upside is unlikely given the company's above average suburban and airport exposure.
  
• Soleil assumed Office Max (NYSE: OMX) with a Hold rating and $17 target, as they believe macroeconomic challenges and heightened competition will limit near-term upside in the stock.

OTHER INITIATIONS:

• Broadcom (NASDAQ: BRCM), Marvell Tech (NASDAQ: MRVL) and Nvidia (NASDAQ: NVDA) were initiated with Outperform ratings at Cowen.
  
• Knot Inc. (NASDAQ: KNOT) was started with an Outperform rating at William Blair.
  
• Deutsche Bank initiated Cardtronics (NASDAQ: CATM) with a Buy rating and $13 target.

MOST NOTEWORTHY: K-12 Inc., ChinaEdu and Cardtronics were today's noteworthy initiations:

• Baird is positive on K-12 Inc. (NYSE: LRN)'s leadership position and growing market opportunity for expansion. The firm started shares with an Outperform rating and $26 target. Shares were also initiated at Morgan Stanley with an Equal Weight rating and at Credit Suisse with an Outperform rating.
• Bear initiated ChinaEdu (NASDAQ: CEDU) with an Outperform rating and $11.20 target and said demand for post-secondary education in is outstripping the capacity of land based universities and that CEDU will benefit from the governments strategy to raise education levels. Piper, which started shares with a Buy rating and $10 target, believes the online higher education market is still in the relatively early stages as online student enrollments represent less than one-fourth of total university enrollments.
• William Blair believes Cardtronics (NASDAQ: CATM) has a highly attractive opportunity to increase the number of ATM sites it operates. The firm assumed coverage with an Outperform rating.

Other initiataions:

• MedAssets (NASDAQ: MDAS) was initiated with an Overweight rating and $24 target at Lehman, at Deutsche Bank with a Buy rating and $25 target and at Wachovia with a Market Perform rating.
• Jefferies initiated VanceInfo (NYSE: VIT) with a Buy rating and $11 target.
• Susquehanna initiated Under Armour (NYSE: UA) with a Neutral rating.