Dec 13, 2012 10:48AM Notable Analyst Rating Changes 12/13: (RFMD) (AVGO) (GLF) Upgraded; (ALLT) (NBR) (LXK) Downgraded

Dec 28, 2011 07:42AM Short Interest Ticks Up in Large-Cap Biotech, Specifically Amgen (AMGN)

Apr 29, 2011 11:21AM Notable Analyst Rating Changes 04/29: (CL) (DISCA) (UIS) Upgraded; (RIMM) (OSK) (IM) Downgraded

Aug 3, 2009 08:04AM Jefferies & Co Downgrades United Therapeutics (UTHR) to Hold

Sep 24, 2008 07:55AM Jefferies & Co Initiates Coverage on United Therapeutics (UTHR) with a Buy