Jerome Kerviel, a 31-year-old junior trader at Societe Generale, built up a $73 billion position and caused the French bank to lose $7 billion. The trader’s actions have been described as “the greatest bank fraud in history,” though officially the trader has not yet been charged with anything. Authorities have seized computer disks and documents from his home and office in an effort to discover the extent of fraud associated with his actions. Some traders at the bank followed some of the same practices, according to reports.”]
Source: https://www.darkreading.com/analytics/societe-generale-how-did-it-happen-