Yum Brands reported mixed second-quarter results, with earnings per share topping estimates but revenue falling short. Same-store sales decreased 1 overall for Yum, as KFC and Pizza Hut saw declines of 3. Only Taco Bell reported growth, with a 5 increase. Taco Bell continues to outperform rivals with its reputation for value resonating with cost-conscious customers. Yum is expanding artificial intelligence to hundreds more Taco Bell drive-thrus by year-end to enhance the digital experience.