Southern Co. (SO) closed the latest trading day at $93.61, indicating a -0.57% change from the previous session's end. This change lagged the S&P 500's 0.22% gain on the day. Elsewhere, the Dow saw a downswing of 0.33%, while the tech-heavy Nasdaq appreciated by 0.76%.The power company's stock has climbed by 5.37% in the past month, exceeding the Utilities sector's loss of 1.27% and the S&P 500's gain of 1.47%.The investment community will be paying close attention to the earnings performance of Southern Co ...