NEW YORK ( TheStreet) -- CHANGE IN RATINGS

Aluminum Corp of China ( ACH) downgraded at Deutsche to Hold from Buy at Deutsche Bank.

Air Methods ( AIRM) initiated at RBC with a Sector perform rating and $34 price target at RBC Capital.

Amkor Technologies ( AMKR) upgraded at Deutsche to Buy from Hold. Price target lifted to $8 from $7.50.

American Public Education ( APEI) downgraded at Barrington Research to Market Perform from Outperform. Valuation call.

Biomed Realty Trust ( BMR) upgraded at Wells Fargo to Outperform from Market Perform.

Celgene ( CELG - Get Report) upgraded at Cowen to Neutral from Underperform.

Covance ( CVD) upgraded at Wells Fargo to Outperform from Market Perform.
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Callaway Golf ( ELY) downgraded at JMP Securities to Market Perform from Outperform.

Emergency Medical Services ( EMS) initiated at RBC with an Outperform rating and $66 price target.

Finish Line ( FINL) upgraded at Citi to Buy from Hold on accelerating sales and earnings. Price target increased to $20 from $18. Estimates raised through 2012.

Home Depot ( HD - Get Report) price target cut at FBR Capital to $36 from $40 on expected "OK" 2Q10 sales. Maintain Outperform rating.

Jazz Pharmaceuticals ( JAZZ) upgraded at Barclays to Overweight from Equal Weight on valuation. Price target raised to $15 from $12.

Lincare ( LNCR) downgraded at Susquehanna to Neutral from Positive.

PAA Natural Gas Storage ( PNG) initiated at Barclays with an Overweight rating and $27 price target. Visible organic growth should drive 8% distribution growth over next 3 years.

Gibraltar Industries ( ROCK) upgraded at Jefferies to Buy from Hold. Price target raised to $16 from $13.

Rosetta Resources ( ROSE - Get Report) downgraded at Suntrust to Neutral from Buy.

Rural/Metro ( RURL) initiated at RBC with an Outperform rating and $9 price target.

SuccessFactors ( SFSF) initiated at RBC with an Outperform rating and $27 price target.

T. Rowe Price ( TROW) upgraded at Wells Fargo to Outperform from Market Perform.

Vivus ( VVUS) downgraded at Lazard to Hold from Buy.

STOCK COMMENTS / EPS CHANGES

Cytec ( CYT) estimates raised at Credit Suisse. CYT 2010, 2011 and 2012 EPS estimates lifted to $2.68, $3.48, and $4.39, respectively. CYT offers significant growth in 2010 and beyond. Maintain Outperform rating and $58 price target.

Energy Recovery ( ERII) price target cut at Citi to $4 from $7.50 on lower guidance. Maintain Hold rating.

Tenet Healthcare ( THC - Get Report) estimates raised at Goldman. THC 2010 and 2011 EPS estimates lifted to $0.39 and $0.42, respectively, on favorable trends. Maintain Neutral rating and $5.50 price target.

Tenet Healthcare ( THC - Get Report) estimates higher at Barclays. THC 2010 and 2011 EPS estimates boosted to $0.37 and $0.39, respectively, on cost improvements. Reiterate Overweight rating and $8 price target.

This article was written by a staff member of TheStreet.com.