The online travel sector went through a period of consolidation in 2015 as bigger players snapped up rivals, creating a landscape dominated by Priceline Group Inc. and Expedia Inc. The two leaders have a roughly 95% share of the online travel agencies market, according to a July report from Harvard Business School. But new niche players are still emerging, including room-sharing services like Airbnb and HomeAway, and even search giant Google with its Google Flights service, adding to the worry about saturation. “Priceline’s guidance will inevitably divide investors into two camps: those that view this as structural headwinds from market saturation/competition (bears) and those that view this as transitory headwind from tough comps (bulls),” Raymond James analysts wrote in a note. “We remain on the sidelines on TripAdvisor as the strength in non-hotel and less severe margin erosion are offset by a slow recovery in hotel monetization,” Raymond James analysts wrote in a note. “Mobile monetization and international competition are headwinds that we do not foresee abating in the near term,” they wrote, reiterating a market perform rating. Get the full story at MarketWatch Read also "Why Priceline, TripAdvisor Are Getting Hammered After Earnings" at 24/7 Wall St.