Rhythm Pharmaceuticals, Inc. (RYTM) shares soared 7.4% in the last trading session to close at $53.17. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 5.1% gain over the past four weeks.Last month, Rhythm announced the FDA’s acceptance of the supplemental new drug application for its only marketed drug, Imcivree (setmelanotide), to treat obesity in children as young as two years old. The FDA granted Priority Review to the applica ...