Yum Brands reported overall same-store sales growth of 4% on a two-year basis for the second quarter ended June 30, with that metric positive for all four brands (Taco Bell, Pizza Hut, KFC and The Habit Burger Grill). CEO David Gibbs credited recent investments in technology, such as the acquisition of Kvantum and TicTuk and the more recent purchase of Dragontail Systems Limited, which is expected to close later this year.