Shares of Ligand (NASDAQ: LGND) popped 13% today after its partner GlaxoSmithKline's (NYSE: GSK) drug Promacta received an additional indication (an FDA approval) to increase low blood platelet levels in cases of chronic hepatitis C. However, new advances in hepatitis C care are revolutionizing treatment ideas that may take the wind out of Ligand's sails.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.