You might not be familiar with BBB Foods (TBBB 3.50%). And that's OK. Most stateside investors aren't familiar with the rapidly expanding chain providing deeply discounted groceries and other household essentials to a widening audience with 2,772 locations at the start of this year. It's North America's fastest growing player in its space, but you have to travel to Mexico to see it in action. BBB is the parent company of Tiendas 3B, a small-box supermarket concept with big-time aspirations. The three Bs sta ...