Shares of Expedia Group closed down 18% on Friday, their biggest single-day drop in nearly four years, after the online travel firm said it expected 2024 revenue growth rates to moderate as air fares soften from post-pandemic highs. The company late on Thursday also said Chief Executive Officer Peter Kern would step down from his position and be replaced by company insider Ariane Gorin. Expedia shares snapped a four-day winning streak and dragged down those of other travel firms following the warning. Booki ...