Another rogue trader

The trader thought to have cost one of France's biggest banks 4.9bn euros ($7.1bn; £3.7bn) is in police custody, say reports quoting judicial sources.

The fraud was much larger than the transactions by Nick Leeson that brought down Barings Bank.

more on:
http://news.bbc.co.uk/2/hi/europe/7210889.stm
and wikipedia