The PhoCusWright Online Travel Agency Index, after outperforming in March and April, fell 12 percent in May. While both Expedia and TripAdvisor recorded gains for the month, Priceline's 18 percent drop dragged down the overall Index performance. Despite the weak month, the Index has substantially outperformed on a year-to-date basis, with a gain of 29 percent.

The PhoCusWright Online Travel Ecosystem Index (PTEI) and the PhoCusWright Online Travel Agency Index (POTAI) are key components of PhoCusWright's Money Edition Research Subscription. In addition to access to these stock indexes, the Money Edition subscription features a range of regular publications, all focused on the financial side of the online travel space. The Money Edition is designed to help travel companies and investors "follow the money" and make smart, strategic decisions with clear and actionable analysis of the financial and economic fundamentals of travel.