Tuesday's Upgrades and Downgrades

UPGRADES

OPNET OPNT Collins Stewart Market Perform » Buy
Goodrich Petroleum GDP BMO Capital Markets Market Perform » Outperform
Amylin Pharms AMLN Lazard Capital Hold » Buy
MarkWest Energy MWE Wachovia Mkt Perform » Outperform
Euronet EEFT AG Edwards Hold » Buy
Lamar Advertising LAMR CL King Accumulate » Strong Buy
Mylan Labs MYL Credit Suisse Underperform » Outperform
Isle of Capri ISLE Morgan Joseph Hold » Buy
LandAmerica Fin LFG Keefe Bruyette Mkt Perform » Outperform
Amerigroup AGP Credit Suisse Underperform » Outperform


DOWNGRADES

Tortoise Energy TYY Ferris Baker Watts Buy » Neutral
Tortoise Energy Infrastructure TYG Ferris Baker Watts Buy » Neutral
Medarex MEDX Susquehanna Financial Positive » Neutral
Qualcomm QCOM Am Tech/JSA Research Buy » Neutral
Cardica CRDC AG Edwards Buy » Sell
Seagate Tech STX Matrix Research Hold » Sell
Blue Coat BCSI Stifel Nicolaus Buy » Hold
Noble Corp NE Jefferies & Co Buy » Hold