"In the unusual circumstance that a bond of this size is issued, it is provided to the largest public companies in the world, not to individuals or privately held businesses," the lawyers also said. Mr Trump's team added that they had spent "countless hours negotiating with one of the largest insurance companies in the world" with no success. They also said bond companies would not accept "hard assets such as real estate as collateral" for the bond, but only cash or "cash equivalents", such as investments that can be quickly liquidated. According to a Forbes estimate, Mr Trump is worth about $2.6bn. He also testified last year that he had $400m in liquid assets.