"The Failing New York Times did something I have never seen done before. They used the concept of 'time value of money' in doing a very old, boring and often told hit piece on me. Added up, this means that 97% of their stories on me are bad. Never recovered from bad election call!" Trump said in a Twitter post.
The "time value of money" is the concept that money available at the present time is worth more than money received in the future, because it can be invested to create more wealth.
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The newspaper said its investigation studied tens of thousands of pages of confidential financial records, including more than 200 tax returns filed by Fred Trump, his companies and other Trump partnerships and trusts.
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Trump has frequently claimed that he built his own empire with only a $1 million loan from his father, which he paid back in full.
Trump attorney Charles Harder was quoted in the report as saying that the newspaper’s claims of fraud and tax evasion were 100 percent false and highly defamatory. But according to media reports, the US State of New York's Taxation Department is investigating the claims.