Analyst Upgrades

• Oppenheimer upgraded ConocoPhillips (COP) to outperform from perform after the company sold its stake in Syncrude. The firm has a $70 price target for shares.
• Leerink upgraded UnitedHealth (UNH) to outperform from market perform. The firm sees upside to the company's 2010 guidance and finds shares attractively valued at currently levels.
• Citigroup upgraded both Mirant (MIR) and RRI Energy (RRI) to hold from sell after the two companies agreed to merge.
• Cooper Companies (COO) was upgraded to outperform from market perform at FBR Capital.
• Expedia (EXPE) was upgraded to conviction buy from neutral at Goldman.
• A123 Systems (AONE) was upgraded to buy from hold at Deutsche Bank.

MORE NOTEWORTHY: InterMune, Inc (ITMN), Riverbed Technology, Inc (RVBD), Credence Systems Corp (CMOS) and MWI Veterinary Supply, Inc (MWIV) were today's more notable initiations:

• American Technology started InterMune Inc (NASDAQ: ITMN) with a Buy rating and $29 target as the firm believes the recent share weakness in InterMune provides a buying opportunity. The firm expects significant news flow from the ITMN-191 program over the next 12 months to provide positive catalysts to shares.

• Pacific Crest initiated Riverbed Technology Inc (NASDAQ: RVBD) with an Underperform rating and $22 target, citing valuation.

• Credit Suisse started Credence Systems (NASDAQ: CMOS) with an Underperform rating and $3 target.

• JP Morgan started MWI Veterinary (NASDAQ: MWIV) with an Overweight rating, saying industry fundamentals are favorable and MWIV's growth prospects are strong.

OTHER INITIATIONS:

• UBS & Merrill Lynch both started Duncan Energy Partners (NYSE: DEP) with a Neutral rating.

• Employers Holdings, Inc (NYSE: EIG) was initiated with an Equal-Weight rating at Morgan Stanley.

• Needham initiated Cascade Microtech, Inc (NASDAQ: CSCD) with a Buy rating and $18 target.

• Credit Suisse assumed coverage of Teradyne, Inc (NYSE: TER) and Amkor Technology (NASDAQ: AMKR) with a Neutral rating and $17 target.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).