Amgen (AMGN) closed at $305.02 in the latest trading session, marking a -0.22% move from the prior day. The stock's change was less than the S&P 500's daily loss of 0.11%. At the same time, the Dow lost 0.22%, and the tech-heavy Nasdaq lost 0.23%.The world's largest biotech drugmaker's shares have seen a decrease of 2.29% over the last month, not keeping up with the Medical sector's gain of 4.12% and the S&P 500's gain of 3.51%.Investors will be eagerly watching for the performance of Amgen in its upcoming ...