CHANGE IN RATINGS

Ambac Financial upgraded at Friedman, Billings Ramsey from Market Perform to Outperform. Stock looks undervalued, following the recent affirmation of the company's AAA credit rating by Moody's.

American Eagle Outfitters ( AEO - Get Report) upgraded at Bear Stearns to Outperform from Peer Perform. Cites company is well-positioned in favorable teen sub-sector and valuation is compelling. Sets $30 target price.

Apria Healthcare upgraded at UBS to Neutral rating from Sell. Price target lifts to $24 from $22 and FY 2008 EPS estimates hold at $1.95.

Countrywide Financial downgraded at Citigroup from Buy to Hold. $12 price target. Company lacks near-term catalysts and continues to face a lot of headwinds. Estimates also cut.

Capital One Financial ( COF) downgraded at Citigroup from Hold to Sell. $45 price target. Estimates also cut, as credit quality is deteriorating. $45 price target.

Euronet Worldwide ( EEFT - Get Report) upgraded at Citigroup from Sell to Hold. $29.50 price target. Remain bearish on the MGI acquisition, but that and other operating risks have already been priced into the stock.

MDU Resources ( MDU) upgraded at Citigroup from Hold to Buy. $31.50 price target. Bakken position is not fully valued in the stock, and the company will likely receive a favorable court ruling on its CBM development.

Pricline.com ( PCLN) downgraded at Citigroup from Buy to Hold. $124 price target. Valuation call, as the stock is up 41% since earnings.

Savient Pharma ( SVNT) upgraded at Merrill from Neutral to Buy. $28 price target. Believe that positive Phase III data will lead to FDA approval for Puricase.

Symantec ( SYMC) downgraded at Cowen to Neutral from Outperform. Cites slower unit growth and a more competitive landscape.

Terra Industries upgraded at Merrill to Buy. Earnings should be driven by higher prices for fertilizer nutrients. Earnings should double in 2008.

STOCK COMMENTS / EPS CHANGES

Apple ( AAPL) numbers raised at UBS. Price target lifts to $235 from $220 and FY 2008 EPS estimates upped to $5.05 from $4.73. Reiterates Buy rating.

American Express ( AXP) numbers reduced at Citigroup to $61 a share. Estimates also lowered through 2009, given the expectation for higher loss provisions. Buy rating.

Black & Decker target price cut at Deutsche Bank by $5 to $95 after company preannounced disappointing Q4 results. Maintained Buy rating.

Discover Financial ( DFS) numbers cut at Citigroup to $14 a share. Estimates also lowered, as mortgage weakness is starting to leak into the credit card sector. Sell rating.

ManTech ( MANT) numbers raised at Jefferies. Price target lifts to $50 from $48 and 2008 EPS estimates upped to $2.24 from $2.17. Reiterates Buy rating.

Annaly ( NLY) 2008 estimates raised at Deutsche Bank by 31 cents to $2.06 a share as company should benefit from declining funding costs. Target price raised to $21.

Pier 1 Imports ( PIR - Get Report) target price cut at Deutsche Bank from $6 to $4.75 as comps and gross margins are likely to disappoint for years. Maintained Hold rating.

Safeway ( SWY) numbers raised at Morgan Stanley. Price target upped to $43 while FY 2008 EPS estimates hold at $2.16. Reiterates Over-weight rating.

WellCare Health Plans ( WCG - Get Report) numbers raised at Jefferies. Price target lifts to $66 from $50 and 2009 EPS estimates upped to $5.65 from $5.50. Reiterates Buy rating.

Wells Fargo ( WFC) numbers lowered at Morgan Stanley. FY 2008 EPS estimates dip to $2.65 from $2.71 while price target holds at $30. Reiterates Equal-weight rating.