Merck (MRK) closed at $115.86 in the latest trading session, marking a +0.53% move from the prior day. The stock fell short of the S&P 500, which registered a gain of 0.54% for the day. Meanwhile, the Dow gained 0.72%, and the Nasdaq, a tech-heavy index, added 0.65%.Shares of the pharmaceutical company have appreciated by 1.71% over the course of the past month, underperforming the Medical sector's gain of 4.37% and the S&P 500's gain of 4.86%.The investment community will be closely monitoring the performa ...