Pfizer (PFE) closed the latest trading day at $27.93, indicating a -0.43% change from the previous session's end. The stock trailed the S&P 500, which registered a daily gain of 0.1%. At the same time, the Dow lost 0.08%, and the tech-heavy Nasdaq gained 0.28%.Prior to today's trading, shares of the drugmaker had lost 1.85% over the past month. This has lagged the Medical sector's loss of 0.44% and the S&P 500's gain of 4.08% in that time.Analysts and investors alike will be keeping a close eye on the perfo ...