Nadir was giving evidence at the Old Bailey where his trial for theft is in its fifth month.
The former head of Polly Peck International (PPI) is accused of siphoning off £150million from his business empire.
The company was put into administration in 1990 with debts of £550million.
Nadir, of Mayfair, central London, denies 13 specimen counts of theft amounting to £34million between 1987 and 1990.