Citigroup Inc. (C) could be compelled to sell its profitable and highly rated Mexican subsidiary Banamex due to a probe expected this week by Mexico’s Supreme Court. A group of senators has objected that Citigroup’s Mexican subsidiary is in breach of national law since the US government bail-out of the company. National law of Mexico bans foreign governments from owning a stake in domestic banks. Banamex, or Banco Nacional de Mexico, is one of Citigroup's brightest jewels, and accounts for over $20 billion, or 15% of its global profits. A number of other foreign-dominated banks operating in Mexico also remain exposed to the same risk, as many foreign governments own stake in them following the global financial crisis. These banks include American International Group, Inc. (AIG), Bank of America Corporation (BAC) and Bank of New York Mellon Corporation (BK), as well as ...