Nick Leeson, the original rogue trader, was sentenced to 6-1/2 years in Singapore’s Changi Prison after his stock futures trades in the city-state sank Barings Bank. March 1996 – Yasuo Hamanaka, a former Sumitomo Corp trader, was sentenced to eight years for forgery and fraud for amassing $2.6 billion in trading losses.

source https://in.finance.yahoo.com/news/factbox-traders-trouble-does-mitsubishis-154919765.html?.tsrc=rss