Coming into Tuesday's fourth-quarter financial report, TripAdvisor investors had expected to see solid gains in revenue and earnings. Results were reasonably good, but a combination of weakness in certain areas and concerns about the company's forecast for early 2019 weighed on investor sentiment.

A closer look at the company's segments showed ongoing challenges in the hotel division. Revenue for the business was down 2%, as a 20% plunge in what the company calls "other hotel revenue" from non-TripAdvisor branded websites offset flat to slightly higher results from sources bearing the TripAdvisor brand.