It is the first time Trump indicates that he is willing to negotiate on the levels, and it goes against what several of his advisors have previously said.
The statement came on the presidential plane Air Force One on the way from Washington to Florida.
It also comes after stock prices around the world have plummeted, long-term interest rates and oil prices have fallen, the dollar has weakened, gold prices have risen, and economists have more loudly warned of declining growth in global trade and possible recession and rising inflation in the USA.
On Thursday, two of the three major indices on the New York Stock Exchange had their worst trading days in five years with large price falls.
According to Trump, it is good that American long-term interest rates are falling, and he says he believes that the economic turbulence will subside.
Earlier on Thursday, Trump insisted that it was only a temporary hiccup that would soon pass into American prosperity.
Markets will flourish, he said to reporters before departing from Washington.
The country will flourish, he continued.
