Early Tuesday morning, Rigel Pharmaceuticals (NASDAQ: RIGL ) and its now-ex-partner, AstraZeneca (NYSE: AZN ) , reported late-stage clinical trial results for the experimental rheumatoid arthritis drug Fostamatinib. In the following video, health-care analyst Max Macaluso discusses why Rigel dropped 18% after the news was released and the risks that lie ahead for Rigel Pharmaceuticals.
While you can certainly make huge gains in biotech and pharmaceuticals, the best investing approach is to choose great companies and stick with them for the long term. The Motley Fool's free report "3 Stocks That Will Help You Retire Rich" names stocks that could help you build long-term wealth and retire well, along with some winning wealth-building strategies that every investor should be aware of. Click here now to keep reading.