In the latest trading session, Merck (MRK) closed at $127.99, marking a +0.38% move from the previous day. The stock outperformed the S&P 500, which registered a daily gain of 0.25%. Elsewhere, the Dow gained 0.15%, while the tech-heavy Nasdaq added 0.03%.Coming into today, shares of the pharmaceutical company had lost 2.66% in the past month. In that same time, the Medical sector gained 0.11%, while the S&P 500 gained 3.34%.The investment community will be closely monitoring the performance of Merck in its ...