Mondelez International has delivered a lacklustre set of 2016 numbers but the snacks giant, which has been buffered by a challenging operating environment, stressed it continues to improve adjusted operating margins. With the entrance of 3G Capital into the food sector, margins have become a key metric for a number of the major names in the industry but Mondelez's results left some wondering if a focus on margins can hamper top-line growth. Katy Askew reports.