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UBS set a daily trading limit for the exchange traded funds desk of 100 billion US dollars (£61.5 billion) and also used hedging to reduce risk - for example buying one type of investment and simultaneously selling a similar one to mitigate any loss.
Prosecutors claim Adoboli failed to hedge several of his investments in order to make a bigger profit for the bank and larger bonus for himself.
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.
A City trader who gambled away £1.4 billion thought he had "the magic touch" but caused "chaos and disaster", a court has heard.
Kweku Adoboli, 32, exceeded his trading limits to try to get a bigger bonus and boost his ego, Southwark Crown Court was told.
He is accused of two counts of fraud and two counts of false accounting while working for Swiss bank UBS.
The charges relate to the period between October 2008 and last September.
The trial of a City trader accused of losing £1.4 billion while working for Swiss Bank UBS is due to begin. Kweku Adoboli will appear at Southwark Crown Court in London, to face two counts of fraud and two counts of false accounting. The prosecution case is expected to open in a few days time.
Adoboli, 32, Whitechapel, east London, is accused of losing the money in Britain's biggest alleged banking fraud. He worked for UBS's global synthetic equities division, buying and selling exchange traded funds, which track different types of stocks, bonds or commodities such as metals.
Adoboli is accused of dishonestly using his position to try to make a personal gain, and causing UBS losses or exposing the bank to the risk of loss. It is alleged that he lost a total of 2.25 billion US dollars and charges relate to the period between October 2008 and last September.
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A "rogue trader" who caused a Swiss bank losses of £1.4 billion was at risk of causing a hole of nearly £7.4 billion, a court has heard.