In the latest close session, Vertex Pharmaceuticals (VRTX) was down 1.68% at $440.87. The stock fell short of the S&P 500, which registered a loss of 0.22% for the day. Meanwhile, the Dow gained 0.08%, and the Nasdaq, a tech-heavy index, lost 0.51%. Heading into today, shares of the drugmaker had gained 3.31% over the past month, outpacing the Medical sector's loss of 0% and the S&P 500's gain of 0.45%.The investment community will be paying close attention to the earnings performance of Vertex Pharmaceutic ...