Wingstop Restaurants Inc.WING recently released initial unaudited sales figures for fourth quarter and fiscal 2017, which ended on Dec 30, 2017. WIngstop faced a number of challenges in the fourth quarter, which included record wing inflation of more than 40% and the negative impact of the recent hurricanes in the United States. In a bid to be among the top ten global restaurant brands, Wingstop focuses on four long-term growth strategies.