In this video, health-care analyst David Williamson discusses Peregrine Pharmaceuticals' announcement and stock pop from completing enrollment of a phase 1 trial for its lead drug candidate bavituximab in breast cancer. Bavituximab has endured a lot of (clinical) trials and tribulations, including in NSCLC and pancreatic cancer, and this video puts today's news into perspective with the larger picture investors need to know.

David Williamson has no position in any stocks mentioned. Follow David on Twitter: @MotleyDavid

The Motley Fool recommends Celgene. 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.