In the year 2015 (including fiscal years to June 2016), retail sales of the 250 largest retailers grew by 5.2% (adjusted for currency valuations) to US$4.308 trillion and net profit margin increased to 3% of sales. On average, international sales accounted for 23% of revenue.
Safe at the top, the U.S. giant Wal-Mart (n°1) remained over four times the size of any rival, showing a global revenue of US$366 billion ahead of Costco (n°2), whose sales have slowed in 2015 after years of meteoric...