Vertex Pharmaceuticals (VRTX) closed at $428 in the latest trading session, marking a +0.03% move from the prior day. The stock's change was less than the S&P 500's daily gain of 0.61%. Meanwhile, the Dow gained 0.3%, and the Nasdaq, a tech-heavy index, added 1.28%.Shares of the drugmaker have appreciated by 4.83% over the course of the past month, outperforming the Medical sector's gain of 1.64% and the S&P 500's gain of 2.08%.Analysts and investors alike will be keeping a close eye on the performance of V ...