Deloitte Touche Tohmatsu ranked the largest retailers around the globe according to their fiscal 2007 sales and found that overseas retail chains are moving up the list. While the US's Wal-Mart Stores remained No. 1 and France's Carrefour stayed in the No. 2 spot, Britain's Tesco and Germany's Metro climbed up a spot to round out the top four. Home Depot dropped to fifth. The trend is likely to continue, according to Deloitte Touche Tohmatsu.