Pfizer (PFE) closed the latest trading day at $27.99, indicating a -1.3% change from the previous session's end. The stock fell short of the S&P 500, which registered a gain of 0.09% for the day. Meanwhile, the Dow lost 0.1%, and the Nasdaq, a tech-heavy index, added 0.16%. Prior to today's trading, shares of the drugmaker had lost 1.8% over the past month. This has lagged the Medical sector's gain of 2.3% and the S&P 500's gain of 2.83% in that time. The investment community will be closely monitoring the ...