The Mexican government temporarily suspended margin buying...

The Mexican government temporarily suspended margin buying in its national stock exchange and announced sanctions against dealers found violating federal laws. Ending an investigation that followed October’s slump in what was once one of the world’s top exchanges, the National Securities Commission also announced that it would impose “severe fines” against trading firms and their managers involved in 87 cases of violations of securities regulations; monitor traders more closely; shore up four exchange houses that appear to be weak financially; strengthen its own operations, and give itself greater powers.