Citigroup is having a bad time in Mexico..Banco Nacional de Mexico, known as Banamex

Citigroup's Mexican woes may be part of the reason the US Federal Reserve last week rejected its plans to increase its dividend and buy back shares. The US Federal Government may be opening an investigation into the bank's dealings in Mexico.

Here's a look at some of the bank's more serious missteps of late:
http://www.globalpost.com/dispatch/news/regions/americas/mexico/140401/citigroup-fraud-mexico-investigation-bad-time