McKesson (MCK) closed the most recent trading day at $599.56, moving -0.8% from the previous trading session. The stock fell short of the S&P 500, which registered a gain of 0.16% for the day. Elsewhere, the Dow gained 0.04%, while the tech-heavy Nasdaq added 0.49%.The prescription drug distributor's shares have seen an increase of 10.04% over the last month, surpassing the Medical sector's gain of 2.32% and the S&P 500's gain of 3.22%.Analysts and investors alike will be keeping a close eye on the performa ...