NEW YORK (TheStreet) -- CHANGE IN RATINGS

AnnTaylor

(ANN)

downgraded at Goldman from Buy to Neutral. Estimates also cut, as promotional activity may increase in the women's sector.

Aon Corp

(AON) - Get Report

upgraded at BofA/Merrill to Buy from Neutral. Share price drop after the announced acquisition of Hewitt presents buying opportunity, Bank of America/Merrill Lynch said. Maintain $45 price target.

Ameristar Casinos

(ASCA)

downgraded at BofA/Merrill to Underperform from Neutral as regional gaming revenues have slowed in 2Q10, Bank of America/Merrill Lynch said. Price target sunk to $11 from $20.

Calix

(CALX) - Get Report

initiated at BofA/Merrill with an Underperform rating and $10 price target. Street is over optimistic on margins targets.

Rockwell Collins

(COL)

upgraded at BofA/Merrill to Buy from Neutral. Expecting bizjet recovery and 787 production ramp-up. Maintain $75 price target.

Copano Energy

( CPNO) downgraded at UBS from Buy to Neutral. $26 price target. Company will like post weak second quarter results.

Commvault Systems

(CVLT) - Get Report

downgraded at Stifel from Buy to Hold. Company is seeing lower sales across the board.

Emcor

(EME) - Get Report

upgraded at FBR from Market Perform to Outperform. $39 price target. Company has a strong balance sheet and should benefit from an improving macro environment.

FMC Corp

(FMC) - Get Report

initiated at Credit Suisse with an Outperform rating and $73 price target. FMC's significantly improved returns and quality of its portfolio offer a solid balance of growth and cash generation.

Hewitt Associates

( HEW) downgraded at Deutsche from Buy to Hold. $48 price target. See limited chance for a competing bid to AON's offer.

Illinois Tool Works

(ITW) - Get Report

upgraded at Deutsche from Hold to Buy. $59 price target. Core revenue growth should outperform the sector.

JP Morgan

(JPM) - Get Report

rated new Outperform at RBC Capital Markets. $45 price target. Stock has been hit of late, but remains attractively valued, given the normalized earnings potential.

Pharmaceutical Product Development

( PPDI) upgraded at Goldman to Buy. $31 price target. Estimates also boosted, given higher sales expectations.

Patterson-UTI

(PTEN) - Get Report

upgraded at Morgan Stanley from Equal-weight to Overweight. $22 price target. Company is leveraged to increasing spot rates.

Syniverse Technologies

( SVR) rated new Buy at Goldman. $26 price target. Company should benefit from continued growth in mobile data growth.

Textron

(TXT) - Get Report

upgraded at BofA/Merrill to Buy from Neutral. Valuation call. Maintain $25 price target.

Urban Outfitters

(URBN) - Get Report

downgraded at Goldman from Buy to Neutral. Valuation call. Estimates also lowered, because of macro growth risks.

STOCK COMMENTS / EPS CHANGES

Alcoa

(AA) - Get Report

estimates lowered at UBS through 2011. Company is seeing lower aluminum prices. Neutral rating and $12.85 price target.

More on Alcoa Why Investors Should Avoid Alcoa

Allergan

(AGN) - Get Report

target upped at Goldman to $81. Company is a potential takeover target. Buy rating.

AOL

(AOL)

target reduced at Goldman to $24. Europe continues to weigh on business. Neutral rating.

Chevron

(CVX) - Get Report

estimates increased at UBS through 2011. Company is guiding toward better results, aided by lower costs. Buy rating and $95 price target.

eBay

(EBAY) - Get Report

estimates, target cut at Goldman. Shares of EBAY now seen reaching $23. Estimates also reduced, given slower international growth and lower U.S. conversion rates. Neutral rating.

Fairchild

(FCS)

estimates, target cut at UBS. FCS estimates were lowered through 2011. Growth could moderate in the near term. Buy rating and new $12 price target.

Novellus Systems

(NVLS)

numbers raised at UBS. Shares of NVLS now seen reaching $29.50. Estimates also increased, as orders should improve in the second half of the year. Neutral rating.

Royal Caribbean

(RCL) - Get Report

numbers lowered at Goldman. RCL estimates were cut through 2012. Company will likely see lower net yields. Neutral rating and new $25 price target.

Shaw

(SHAW)

estimates, target reduced at UBS. Shares of SHAW now seen reaching $38. Estimates also lowered, to reflect the company's lower backlog. Neutral rating.

Wynn Resorts

(WYNN) - Get Report

target cut at Goldman. Shares of WYNN now seen reaching $88. Multiple could contract in the volatile market environment. Neutral rating.

This article was written by a staff member of TheStreet.