Analyst Upgrades

• Bristol-Myers (BMY) to hold from underperform at Jefferies.
• Pep Boys (PBY) to buy from hold at Stifel Nicolaus.
• Tesla Motors (TSLA) to overweight from equal weight at Morgan Stanley.
• Emerson (EMR) to buy from hold at Deutsche Bank.
• ARM Holdings (ARMH) to buy from neutral at BofA/Merrill.
• NetLogic (NETL) and Cavium Networks (CAVM) to buy from hold at Auriga.
• Aimco (AIV) to hold from sell at Citigroup.
• Ceragon Networks (CRNT) to overweight from equal weight at Barclays.

MOST NOTEWORTHY: Some of today's more notable downgrades included Apartment Investment & Management Co (AIV), Weyerhaeuser Company (WY) and Edwards Lifesciences Corp (EW).

• RBC downgraded Apartment Investment & Management Co (NYSE: AIV) to Underperform from Sector Perform based on valuation and concerns regarding the company's transaction focus.

• Weyerhaeuser Co (NYSE: WY) was downgraded at BMO to Underperform from Market Perform based on valuation.

• Morgan Stanley downgraded Edwards Lifesciences (NYSE: EW) to Underweight from Equal-Weight based on increased competition and aggressive Street estimates for the downgrade.

OTHER DOWNGRADES:

• William Blair downgraded TiVo Inc (NASDAQ: TIVO) to Market Perform from Outperform citing slowing customer growth, competition, rising subscriber acquisition costs and valuation.

• Canccord cut Hollis-Eden Pharmaceuticals Inc (NASDAQ: HEPH) to Hold from Buy following the cancellation of the ARS contract.

• Morgan Stanley downgraded Cymer, Inc (NASDAQ: CYMI) to Underweight from Equal-Weight.

• Baird cut Genesco Inc (NYSE: GCO) to Neutral from Outperform following lowered guidance.

• Merriman cut Distributed Energy Systems Corp (NASDAQ: DESC) to Neutral from Buy following the company's lower-than-expected Q4 revenues.

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