The most recent trading session ended with Delta Air Lines (DAL) standing at $49.86, reflecting a -1.83% shift from the previouse trading day's closing. The stock trailed the S&P 500, which registered a daily gain of 0.15%. At the same time, the Dow added 0.36%, and the tech-heavy Nasdaq gained 0.17%.Heading into today, shares of the airline had lost 4.04% over the past month, lagging the Transportation sector's loss of 2.15% and the S&P 500's gain of 3.2% in that time.The upcoming earnings release of Delta ...