Amgen (AMGN) closed the latest trading day at $335.53, indicating a +0.92% change from the previous session's end. The stock's performance was ahead of the S&P 500's daily loss of 1.37%. Meanwhile, the Dow lost 1.21%, and the Nasdaq, a tech-heavy index, lost 2.3%.Coming into today, shares of the world's largest biotech drugmaker had gained 7.46% in the past month. In that same time, the Medical sector gained 0.74%, while the S&P 500 gained 1.11%.The investment community will be closely monitoring the perfor ...