Roivant, Pfizer unveil Priovant Therapeutics focused on autoimmune disease treatments, Roivant stock surges

Shares of Roivant Sciences Ltd. ROIV, -2.30% shot up 10.0% in premarket trading Tuesday, after the biopharmaceutical company and drug giant Pfizer Inc. PFE, +0.56% unveiled Priovant Therapeutics, a bi...