Guess: Analysts' Upgrades, Downgrades

NEW YORK (TheStreet.com) -- CHANGE IN RATINGS

Alkermes (ALKS Quote) downgraded at Jefferies from Buy to Hold. $11.50 price target. JNJ is pulling away from the company's 4-week risperidone formulation.

Alpha Natural Resources (ANR Quote) reinstated at Barclays with an Overweight rating and $50 price target. Analysts said high-quality coal assets combined with the stability and scale of Foundation's thermal coal production makes a compelling investment opportunity. 2009 EPS estimate cut from $2.10 to $1.75 and 2010 raised from $2.90 to $3.20.

Bed, Bath & Beyond (BBBY Quote) rated new Buy at Citigroup. $44 price target. Valuation is correlated to square footage growth.

Dollar Tree (DLTR Quote) upgraded at Barclays from Equal Weight to Overweight on larger customer base and EPS benefits from cost cutting. 2010 and 2011 EPS estimates raised to $3.36 from $3.00 and to $4.10 from $3.46, respectively. Price target lifted to $64 from $48.

Greenhill (GHL Quote) upgraded at Goldman to Neutral from Sell and increased the price target to $75 from $65. Analysts said M&A potentially improving and Greenhill stands to benefit from this trend more than peers. 2010 and 2011 EPS estimates increased to $3.20 from $3.00 and to $4.00 from $3.40.

Heartland Express (HTLD Quote) upgraded at UBS. Rating raised to Neutral from Sell. Price target raised to $16 from $14. Maintains 2009 EPS estimates of $0.68.

Knight Transportation (KNX Quote) upgraded at UBS. Rating raised to Neutral from Sell. Price target raised to $17.00 from $15.50. Maintains 2009 EPS estimates of $0.61.

Olin Corp (OLN Quote) upgraded at Barclays to Overweight from Equal Weight on belief that the bottom of the cl-alkali cycle has been reached. 2009 EPS estimate raised to $0.83 from $0.52 and 2010 set at $0.51. Price target surged from $11 to $22.