Interest rates are one of the things Wall Street cares most about because lower rates can lead to higher prices for stocks and other investments. The downside is they can also give inflation more fuel.

US stocks reversed early gains to end lower on inflation fears and Trump's latest tariff threats. Chances drop for Fed rate cut. Bond yields rise.

U.S. stocks slumped Friday amid worries about higher inflation and tariffs, while a closely watched report gave a mixed picture of the U.S. job market. The S&P 500 was down almost 1%, and the Dow Jones Industrial Average fell more than 400 points,