Shares of United Airlines Holdings ( UAL ) rose in after-hours trading after the airline company reported better-than-expected fourth-quarter results. United reported adjusted earnings of $2.00 compared to estimates of $1.69. Revenue was $13.63 billion compared to Wall Street expectations of $13.54 billion. United also issued first quarter guidance that fell short of analyst estimates, warning that the grounding of the Boeing ( BA ) 737 Max 9 will have an impact on results. Yahoo Finance's Julie Hyman and Josh Lipton discuss the results.