Also see: AIG, Micron: Analysts' New Ratings

NEW YORK ( TheStreet) -- STOCK COMMENTS/EPS CHANGES

TD Ameritrade  ( AMTD - Get Report) estimates were lowered through 2012 at UBS. Trading activity is declining. Neutral rating and $23 price target.

Cliffs Natural   ( CLF - Get Report) estimates were raised through 2013 at Morgan Stanley. Company has potential positive catalysts ahead. Equal-weight rating.

Darling  ( DAR - Get Report) estimates were boosted through 2013 at Goldman Sachs. Company is leveraged to higher by-product prices. Buy rating.

DeVry  ( DV) price target lifted to $48 from $42 at Credit Suisse. CFO to retire but Gainful Employment ruling removes uncertainty. Maintain neutral rating.

CarMax  ( KMX - Get Report) estimates were reduced through 2012 at Oppenheimer. Disruptions in the auto supply chain and higher gas prices could weigh on near-term results. Outperform rating.

Motorola Mobility   ( MMI - Get Report) estimates were increased through 2012 at UBS. Company is growing through better exposure with Sprint. Buy rating and $34 price target.

National Semiconductor  ( NSM) price target raised at Credit Suisse to $25 from $14 as industrials and communications drive upside. Maintain neutral rating.

Newell Rubbermaid  ( NWL - Get Report) is now seen reaching $16 at Jefferies. Estimates were also cut, given the company's new guidance. Hold rating.

Prudential  ( PRU - Get Report) estimates were boosted through 2012 at FBR Capital Markets. Company is buying back more stock. Outperform rating.

Plains Exploration   ( PXP) is now seen reaching $52 at Goldman Sachs. Estimates were also upped, given better production growth. Buy rating. Research In Motion  ( RIMM) target was cut to $42 at ThinkEquity. Company lacks earnings visibility. Hold rating.

J.M. Smucker   ( SJM - Get Report) estimates were raised through 2013 at Goldman Sachs. Company continues to execute well, despite rising input costs. Neutral rating and new $82 price target.

Under Armour  ( UA - Get Report) is now seen reaching $74 at Goldman Sachs. Estimates were also increased, as new products should help drive growth.

Vecco Instruments  ( VECO - Get Report) price target was lifted at Bank of America/Merrill Lynch to $62 from $55 on China's MOCVD order momentum. Estimates were boosted through 2012. Company continues to see strong demand from China. Maintain buy rating.

End of report.

This article was written by a staff member of TheStreet.