Also, during the more recent past, the proportion of flows coming from the United States has been decreasing. In addition to the impetus from NAFTA, other factors such as the liberalization of FDI restrictions in several areas, such as the financial and the telecommunication sectors, contribute to explaining the larger inflows.
Both features, as well as the key provision that no authority will be able to order the Banco de México to provide financing, are stipulated at the constitutional level.