Once upon a time, America spelled cheese K-R-A-F-T, and Oscar Mayer had a way with B-O-L-O-G-N-A. But lately, those brands haven’t been doing well for their owner, Kraft Heinz. The packaged-foods giant announced that it’s writing down the value of Kraft and Oscar Mayer by more than $15 billion. In today’s market, those iconic brands […]