Travel stocks are companies that generally specialize in transportation, lodging, or amusement. Traveling is a multi-faceted endeavor and can often take a number of different forms. As such, bookings companies like Booking Holdings are just as much travel stocks as airlines or hotels. Even peer-to-peer lodging platforms like Airbnb are considered travel stocks. Traveling is a good example of an economy-dependent business that tends to take off when times are good and slows down when things cool off.