With Japanese retailer FamilyMart in the process of shutting down its Famima!! convenience stores and Tesco's foray fading from memory after the British retailer sold its small-format Fresh & Easy grocery stores, the current trend of foreign companies planting new U.S. convenience-store flags is downward. One exception appears to be Fomento Economico Mexicano SAB de CV , owner of the OXXO chain of convenience stores in Mexico.