The latest trading session saw GSK (GSK) ending at $41.19, denoting a +0.81% adjustment from its last day's close. The stock lagged the S&P 500's daily gain of 1.11%. Meanwhile, the Dow gained 0.8%, and the Nasdaq, a tech-heavy index, added 1.24%.Shares of the drug developer witnessed a loss of 6.24% over the previous month, trailing the performance of the Medical sector with its loss of 2.46% and the S&P 500's gain of 0.48%.The investment community will be paying close attention to the earnings performance ...