Research Calls

Published on Friday, 17 August 2012 07:55 Written by Christopher Lynn

New York, August 17^th (TradersHuddle.com) – Following are some of the upgrades and downgrades before the market open.

Acme Packet (NASDAQ: APKT) was downgraded to Underperform from Market Perform at Raymond James.

Cabot Oil & Gas (NYSE: COG) was upgraded to Overweight from Neutral at JPMorgan.

Ceradyne (NASDAQ: CRDN) was upgraded to a Buy from Hold at ThinkEquity.

Cerner (NASDAQ: CERN) was downgraded to Equal-Weight from Overweight at Morgan Stanley.

CRH Plc. (NYSE: CRH) was downgraded to Underperform from Neutral at Credit Suisse.

Groupon (NASDAQ: GRPN) was downgraded to Underweight at Evercore. The firm slashed its target price to $3 from $6.50.

Idenix Pharmaceuticals (NASDAQ: IDIX) was upgraded to a Hold from Sell at Brean Murray.

Liberty Interactive (NASDAQ: LINTA) was downgraded to Equal-Weight from Overweight at Morgan Stanley.

Marvell (NASDAQ: MRVL) was downgraded to Sector Perform from Outperform at RBC Capital.

McKesson (NYSE: MCK) was downgraded to Equal-Weight from Overweight at Morgan Stanley.

Viacom (NASDAQ: VIAB) was upgraded to Outperform from Market Perform at Wells Fargo.

Vivus (NASDAQ: VVUS) was downgraded to Underperform from Hold at Jefferies.

Walgreen (NYSE: WAG) was upgraded to Equal-Weight from Underweight at Morgan Stanley.

WellPoint (NYSE: WLP) was downgraded to Equal-Weight from Overweight at Morgan Stanley.