Adoboli was jailed last month for the biggest fraud in British history.
But Adoboli's former supervisor at UBS said he did not agree that they were pressured from the top.
'I think you have personal levels of stress that you put upon yourself', John Hughes said in an interview with the BBC. 'One of the things that people should look for in the characters that they hire to a trading floor is that they can cope with different types of situations'.
Hughes likened trading to a game of nerves, testing whether a trader could hold his ground against other market participants.
'It's psychological warfare', he said.
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