Stocks were sharply lower in early-afternoon trading Monday amid ongoing uncertainty about the impact of policies coming from the Trump White House and concerns about the outlook for the U.S. economy. The S&P 500 and tech-heavy Nasdaq were down 2.2% and 3.7%, respectively, in recent trading, while the Dow Jones Industrial Average slipped 1.3%. The major indexes gained ground on Friday but posted steep losses for the week, with the S&P 500 recording its worst weekly performance in six months. The S&P 500 and Nasdaq Composite, which each fell more than 3% last week, have returned to pre-election levels after losing ground for three consecutive weeks. Investor sentiment has been dented recently by worries about President Trump's plans for widespread tariffs, which experts say will