Is This Biotech Stock a Buy Following a Landmark Approval?

Provention Bio (NASDAQ: PRVB) is a small-cap biotech whose shares have doubled in the past three months. The company can thank the expected and eventual approval of Tzield for that performance. In mid-November, Tzield became the first and only treatment approved by the U.S. Food and Drug Administration (FDA) for the delay of the onset of type 1 diabetes (T1D) in at-risk patients.