Biotech Astex Pharmaceuticals (UNKNOWN:ASTX.DL) made a huge pop today, after RBC gave the stock an upgrade to "outperform," calling it an "undiscovered gem" and raising the price target a whopping 40%. In this video, Motley Fool health-care analyst David Williamson tells investors about some potentially very exciting phase 2 data soon to be released by the company and gives us a picture of what it could mean for Astex if its trial data is as good as RBC thinks.

David Williamson has no position in any stocks mentioned. The Motley Fool recommends and owns shares of Johnson & Johnson. 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.