Humana (HUM) shares soared 4% in the last trading session to close at $256.62. The move was backed by solid volume with far more shares changing hands than in a normal session. This compares to the stock's 20.9% loss over the past four weeks.Humana stock witnessed a price rise, which might be the result of the company reporting progress in its Medicare star ratings. Per multiple reports, HUM announced that around 20% of its current membership—roughly 1.2 million individuals—are now enrolled in plans rated 4 ...