Wal-Mart Stores is still struggling in the US but it has found a bright spark in the positive comparable sales in its food division. Similarly, this week, Carrefour talked up its ability to turnaround the more sluggish aspects of its businessWal-Mart Stores is still struggling in the US but it has found a bright spark in the positive comparable sales in its food division. Similarly, Carrefour talked up its ability to turnaround the more sluggish aspects of its business this week.