https://www.reuters.com/article/us-priceline-group-outlook-stocks/priceline-shares-tumble-as-profit-forecast-misses-street-view-idUSKBN1D724U >Shares of Priceline Group Inc fell 10 percent in early trading on Tuesday after the U.S. online travel service provider forecast fourth-quarter profit sharply below Street expectations, as it spends heavily to expand advertising its Booking.com to 18 more countries.