Shares of Amarin (AMRN -11.8%) and Horizon Pharma (HZNP -17.4%) sank after each received FDA...

|About: Amarin Corporation PLC (AMRN)|By:, SA News Editor

Shares of Amarin (AMRN -11.8%) and Horizon Pharma (HZNP -17.4%) sank after each received FDA approval of key drugs. Buying the rumor and selling the news? In the case of AMRN's Vascepa, investors are still waiting for New Chemical Entity status to make sure there isn’t a generic competitor. For HZNP, investors may doubt its ability to market its Rayos rheumatoid arthritis treatment.