Financial results from a rival could presage a pleasantly surprising quarter for Tripadvisor.Shares of online travel company Tripadvisor (TRIP 0.92%) jumped by 10.7% in October, according to data provided by S&P Global Market Intelligence -- but I'm afraid there's not a satisfying explanation for the move. Other travel stocks such as Booking Holdings, Expedia, and Airbnb were up in October by comparable amounts. It seems that investors just had an appetite for companies in the space.To be clear, Tripadvisor ...