Editor's Note: Green and red arrows refer to intraday stock price movement.

NEW YORK ( TheStreet) -- CHANGE IN RATINGS

Apple ( AAPL) was initiated with an Outperform rating and $410 price target at Robert Baird. Company should continue to gain market share.

Arch Capital ( ACGL) was downgraded from Buy to Neutral at UBS. Valuation call, based on a $96 price target.

Altera ( ALTR) was downgraded from Buy to Neutral at Ticonderoga Securities. Stock is already pricing in recent market share gains.

Alexion ( ALXN) was started with a Buy rating at Goldman Sachs. $81 price target. Company was also added to the Conviction List, based on the growth potential of Soliris.

Amgen ( AMGN) was started with a Sell rating at Goldman Sachs. $50 price target. Denosumab will carry high prices but offer relatively little benefit.

Amgen was downgraded from Outperform to Market Perform at Leerink Swann. Investors should exercise more caution ahead of the company's upcoming binary events.

Ameristar Casinos ( ASCA) was upgraded to Neutral at Merriman, Curhan Ford. Company should benefit from improving capital markets.

Biogen Idec ( BIIB) was initiated with a Sell rating at Goldman Sachs. $50 price target. Company faces increased competition in the MS market.

Career Education ( CECO) was downgraded from Outperform to Sector Perform at RBC Capital. $18 price target. Company is seeing lower new student growth.

Chesapeake Energy ( CHK) was downgraded from Outperform to Sector Perform at RBC Capital. $30 price target. Company continues to spend.

Covance ( CVD) was downgraded from Buy to Hold at Jefferies. Company is running out of room to cut costs. $45 price target.

CommVault Systems ( CVLT) was downgraded to Market Perform from Market Outperform at JPM Securities. Maintain $25 price target.

Discovery Communications ( DISCA) was downgraded from Outperform to Market Perform at Barrington Research. Valuation call.

EOG Resources ( EOG) was upgraded from Sell to Neutral at MKM Partners. $88 price target. Stock appears attractively valued, following the recent pullback.

Fresh Del Monte ( FDP) was downgraded from Buy to Hold at Jefferies. $23 price target. Banana market has deteriorated.

Fortinet ( FTNT) was downgraded from Overweight to Equal-Weight at Morgan Stanley. Valuation call.

Jones Lang Lasalle ( JLL) was upgraded from Neutral to Buy at Goldman Sachs. Stock is attractively valued, following a post-earnings pullback. $88 price target.

Nordson ( NDSN) was downgraded to Market Perform from Outperform at BMO Capital Markets. Tougher comps coming, BMO Capital Markets said. Maintain $85 price target.

Marathon Oil ( MRO) estimates changed at Barclays. 2010 EPS estimate increased to $3.40, 2011 trimmed to $3.90. Disappointing Droshky performance, Barclays said. Maintain Equal Weight rating and $36 price target.

Marathon Oil numbers were reduced through 2015 at Goldman Sachs. Company seeing lower production in the Gulf of Mexico. Neutral rating and new $35 price target.

Marathon Oil downgraded from Buy to Hold at Deutsche Bank. $36 price target. The company's Droshky project is not meeting expectations.

M&T Bank ( MTB) was upgraded from Sector Perform to Outperform at RBC Capital. $86 price target. WL acquisition should help the company grow.

Newmont Mining ( NEM) was downgraded from Sector Perform to Underperform at RBC Capital. $63 price target. Company lacks near-term catalysts.

Rowan ( RDC) was downgraded from Buy to Hold at Dahlman Rose. Valuation call.

Research In Motion ( RIMM)was started with a Market Perform rating at Wells Fargo. Stock is already pricing in bad news, but lacks near-term catalysts.

Washington Post ( WPO) was downgraded from Buy to Neutral at UBS. $430 price target. Estimates also cut, as Kaplan faces regulatory problems.

Watts Water ( WTS) was downgraded from Buy to Hold at Brean Murray. Company faces difficult comparisons in the coming quarters.

Wynn Resorts ( WYNN) was downgraded to Neutral from Buy at Stern Agee. Concerned that the Macau market overall moves more toward Cotai, Stern Agee said. Price target set at $109.

XL Group ( XL) was downgraded from Buy to Neutral at UBS. Valuation call, based on a $22 price target.

Xilinx ( XLNX) was upgraded from Neutral to Buy at Ticonderoga Securities. $34 price target. Company is losing market share, but the risk/reward is attractive at current levels.
This article was written by a staff member of TheStreet.

If you liked this article you might like

Home Depot Exec Reveals One Secret Behind the Company's Massive Success

Home Depot Exec Reveals One Secret Behind the Company's Massive Success

Jim Cramer: The Government Should Admit It Goofed With These Crazy Instruments

Jim Cramer: The Government Should Admit It Goofed With These Crazy Instruments

There Are Many Signs Investors Have Totally Forgotten About S&P 500 Correction

There Are Many Signs Investors Have Totally Forgotten About S&P 500 Correction

Quick Tips: Now What Should Investors Do?

Quick Tips: Now What Should Investors Do?

7 Inexpensive ETFs for Small-Cap and Micro-Cap Exposure

7 Inexpensive ETFs for Small-Cap and Micro-Cap Exposure