U.S. stocks started lower on Tuesday as investors await Fed Chair Powell's remarks about the economy, tariffs, inflation and more.

Markets will navigate a busy slate of earnings and inflation data this week, with Fed Chairman Jerome Powell also facing lawmakers on Capitol Hill.

U.S. stocks slumped as worries flared again on Wall Street about tariffs and inflation. The S&P 500 fell 0.9% Friday and wiped out what had been a modest gain for the week. The Dow Jones Industrial Average sank 1%,