Analyst upgrades:

• Jefferies upgraded SAP (NYSE: SAP) to Buy from Hold on expectations license declines will trough in Q2 and margins will expand going forward due to cost control and price increases. The firm has a $46 price target on shares.
• BofA/Merrill upgraded STMicroelectronics (NYSE: STM) to Buy from Underperform on expectations the company will benefit from improving industry fundamentals in 2010.
• Citigroup upgraded Freeport McMoRan (NYSE: FCX) to Buy from Hold to reflect the firm's positive copper outlook, as well as valuation following the recent pullback in shares. The firm has a $58 price target on the stock.
• Phototronics (NASDAQ: PLAB) was upgraded to Buy from Neutral at UBS.
• Anglo American (NASDAQ: AAUK) was raised to Hold from Sell at RBS.
• Peabody Energy (NASDAQ: BTU) was upgraded to Buy from Neutral at Goldman.

Analyst upgrades:

• Empire District Electric (NYSE:EDE) was upgraded to Buy from Hold at Jefferies on valuation. The firm raised its target to $18.50 from $16.
  
• Actividentity (NASDAQ:ACTI) was upgraded to Buy from Hold at Soleil and its target was increased to $3.25 from $2.50 on valuation.
  
• Merrill upgraded Phototronics (NASDAQ:PLAB) to Buy from Underperform citing cost reductions, the amended credit agreement, and expectations for growth after the January quarter.

Analyst downgrades:

• Roth Capital downgraded RTI Biologics (NASDAQ:RTIX) to Hold from Buy and lowered its target to $3 from $6 following its negative Q4 negative pre-announcement.
  
• Morgan Joseph said Ceradyne (NASDAQ:CRDN) will not ship any new X-SAPI body armor in Q4 due to a contract protest by a competitor. The Army has decided to seek new bids but CRDN management expects to win a similar order in late January with deliveries expected in late 1Q09. Shares were downgraded to Hold from Buy.

Analyst initiations:

• William Blair initiated Grand Canyon (NASDAQ:LOPE) with an Outperform rating. The firm believes the company has strong growth prospects amid a favorable industry backdrop.
  
• Keefe Bruyette resumed coverage of Assured Guaranty (NYSE:AGO) with a Market Perform rating and $12.50 target, citing financial guaranty market instability.
• Capital Source (NYSE:CSE) was reinstated with a Neutral rating at Credit Suisse.
  
• Yongye Biotechnology (OTC:YGYB) was initiated with a Buy rating and $3.50 target at Roth Capital.

MOST NOTEWORTHY: Cheesecake Factory (CAKE), Buffalo Wild Wings (BWLD), Alltel (AT), Home Depot (HD) and Nokia (NOK) were today's more noteworthy downgrades:

• Cheesecake Factory (NASDAQ: CAKE) was downgraded to Sector Perform from Outperform at CIBC, to Outperform from Strong Buy at Raymond James and to Peer Perform from Outperform at Bear Stearns after the company reduced its second quarter guidance.

• Buffalo Wild Wings (NASDAQ: BWLD) was cut to Neutral from Buy at Merriman on valuation.

• Lehman downgraded Alltel Corp (NYSE: AT) to Equal Weight from Overweight as the firm doesn't expect a competing bid for the company.

• Home Depot (NYSE: HD) was cut to Market Perform from Outperform following yesterday's rally and feels that with the HD sale out of the way, the focus will now turn to Home Depot's ability to grow in the challenging do-it-yourself retail market. Goldman cut Nokia to Neutral from Buy on valuation...

OTHER DOWNGRADES:

• JP Morgan cut Headwaters (NYSE: HW) to Underweight from Neutral.

• Citigroup downgraded Prudential Financial (NYSE: PRU) to Hold from Buy.

• Matrix USA cut Phototronics (NASDAQ: PLAB) to Sell from Hold.

• Ferris, Baker downgraded Gladstone Commercial Corp (NASDAQ: GOOD) to Neutral from Buy.

• Citigroup removed Office Depot (NYSE: ODP) from its Citi Recommended List.

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