Keryx Biopharmaceuticals (NASDAQ:KERX) stunned the market yesterday after releasing positive phase 3 data for its hyperphosphatemia drug Zerenex. Shares jumped around 75% after the news was released, and investors are still enjoying the newfound optimism surrounding this biotech company. Shares hopped another 40% today, but what caused this additional jump? What should investors watch for going forward? In this video, health care analyst Max Macaluso dives into these questions.

Max Macaluso, Ph.D., has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not 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.