During almost four hours on the witness stand, the former President denied claims that he deceived banks and aired many complaints with the case.
The judge has already ruled the Trump Organization committed fraud and this trial will determine the penalties.
Prosecutors are seeking a $250m (£202m) fine and severe business restrictions.
During his highly anticipated appearance at a Manhattan federal courthouse on Monday, Mr Trump, 77, was asked about the value of various properties including his Florida estate Mar-a-Lago, Trump Tower in New York and his golf course in Scotland.
These properties are among several that prosecutors say were intentionally overvalued in company statements in order to secure better loans and insurance policies.
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