Kweku Adoboli worked for UBS's global synthetic equities division, buying and selling exchange traded funds (ETFs), which track different types of stocks, bonds or commodities such as metals.
UBS discovered in September last year that Adoboli's deals had caused the bank a loss of 2.3 billion US dollars (£1.4 billion), and "his fraud had unravelled", the court was told.
To put the huge trading loss in some sort of perspective, 2.3 billion US dollars is enough to pay a year's salary for nearly 70,000 new nurses or two Wembley stadiums or perhaps even six new hospitals.
This colossal loss arose purely as a result of Mr Adoboli's fraudulent deal making, which amounted as you will see, to nothing more than gambling.
He was lying to the bank, both to his senior managers, his risk control department, and the accounts department.
In effect he was risking the very existence of the bank by gambling its resources, ultimately for his own benefit.
More top news
Former England cricket captains David Gower and Mike Gatting were once team mates - now they're on opposing sides.
Romano van der Dussen, wrongly convicted for crimes committed, by Sally Anne Bowman's killer has told ITV News London of his anger.
A two-storey 'mushroom house' in Surrey was named Britain's best, beating off 3,000 other entries.