Utilize the input text as a context reference, choose the right relationship between Banamex and Citigroup from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Thu, Jul 23, 2015, 00:04 BST - UK Markets open in 7 hrs 56 mins Citigroup shuts Banamex USA, pays $140 mn in fines AFP – 40 minutes ago View Photo

Answer: operator