Shares of Southwest Airlines Co (NYSE:LUV) are 0.4% lower at $30.31, as the airline giant prepares to report third-quarter results before the open on Thursday, Oct. 24. According to Zacks, analysts expect the company to post earnings of 5 cents per share -- an 86.8% decline from a year ago -- on revenue of $6.8 billion.A look at the last two years shows LUV tends to underperform the day after earnings. In fact, the equity finished lower in six of its last eight post-earnings sessions. Shares averaged a 4.2% ...