Delta Air Lines (DAL) closed the latest trading day at $50.79, indicating a -1.46% change from the previous session's end. The stock's change was less than the S&P 500's daily gain of 0.42%. Meanwhile, the Dow experienced a rise of 0.04%, and the technology-dominated Nasdaq saw an increase of 0.38%.Heading into today, shares of the airline had gained 21.3% over the past month, outpacing the Transportation sector's gain of 3.57% and the S&P 500's gain of 2.06% in that time.The upcoming earnings release of De ...