https://www.bloomberg.com/news/articles/2017-08-03/taco-bell-s-star-begins-to-fade-at-yum-as-sales-underwhelm

Same-store sales at the Mexican-inspired chain increased 4 percent last quarter, missing the 5.9 percent estimate of analysts. While that growth was still stronger than at Yum’s other divisions -- KFC and Pizza Hut -- those chains both came in ahead of projections.

The results raise concern for a company that’s been relying heavily on Taco Bell since the spinoff of its Chinese operations last year. The taco seller has had success in the U.S. with buzzy food items and a mobile-ordering application that has resonated with younger diners. Yum also is expanding the brand internationally, adding hundreds of restaurants in markets such as India, China and Brazil.