Roivant Sciences Ltd. (ROIV) shares ended the last trading session 7.8% higher at $15.28. The jump came on an impressive volume with a higher-than-average number of shares changing hands in the session. This compares to the stock's 20.6% gain over the past four weeks.Roivant shares gained after the company, along with its partner, Priovant Therapeutics, announced that their investigational candidate, brepocitinib, met the primary endpoint and all nine key secondary endpoints, with statistical significance, ...