Travere Therapeutics (TVTX) shares soared 5.2% in the last trading session to close at $7.31. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 9.6% gain over the past four weeks.The sudden rise in the stock price has likely been driven by the growing optimism of investors regarding Filspari’s (sparsentan) potential to earn increasing revenues for the company. The drug, approved for treating IgA nephropathy, a form of kidney diseas ...