What's Ahead for Rigel Pharmaceuticals After This 18% Plunge?

Early Tuesday morning, Rigel Pharmaceuticals and its now-ex-partner, AstraZeneca , 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.

The article What's Ahead for Rigel Pharmaceuticals After This 18% Plunge? originally appeared on Fool.com.

Max Macaluso, Ph.D., and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

Copyright © 1995 - 2013 The Motley Fool, LLC. All rights reserved. The Motley Fool has a disclosure policy.