US President Donald Trump said bad things about the boss of the US central bank. He wants the central bank to lower interest rates. He thinks this will help the US economy. He called the central bank boss a "loser" and said he is too slow.

After Trump said these things, US stock prices went down. The S&P 500, Dow Jones, and Nasdaq all lost value. The US dollar also became weaker. Many people are worried about the US economy. Some people are buying gold because they think it is safer.

Trump has said bad things about the central bank boss before. He wants him to make it cheaper to borrow money. Some people think Trump wants to fire the central bank boss. But it is not clear if he can do this. Many people think the central bank should be independent.