Amphastar Pharmaceuticals (AMPH) closed the most recent trading day at $55.61, moving +1.85% from the previous trading session. This move outpaced the S&P 500's daily gain of 0.57%. At the same time, the Dow lost 0.14%, and the tech-heavy Nasdaq gained 1.25%. Prior to today's trading, shares of the specialty pharmaceutical company had gained 1.05% over the past month. This has lagged the Medical sector's gain of 2.05% and the S&P 500's gain of 5.07% in that time. Investors will be eagerly watching for the p ...