Why Roche Holdings Stock Popped Today

Roche's new Alzheimer's test has a long road ahead of it, but it may help boost the pharmaceutical company's slow growth rate.Shares of Swiss pharmaceuticals giant Roche Holdings (RHHBY 1.21%) stock popped 2.5% in early trading Thursday before giving back about half of its gains.Roche announced this morning that the U.S. Food and Drug Administration has awarded the "Breakthrough Device Designation" to its new Elecsys pTau217 plasma biomarker test for identifying amyloid pathology, a key feature of Alzheimer ...