INVEX Banco Banco INVEX is a private Mexican banking company, which provides financing products and services in local and foreign currencies. The bank also provides financial consultancy services covering investment, savings and infrastructure funds. INVEX Banco is part of INVEX Controladora, through Invex Grupo Financiero. It has offices in Guadalajara, Federal District and Monterrey, and operates a branch in Miami, United States. In 2014, Banco Invex acquired Mexico's credit card portfolio of Brazil's Itaú Unibanco, a move in line with Invex's strategy to become the country's leader in the payment systems business.