It was a gloomy start to 2016 on Wall Street, as stocks sank as part of a global sell-off.
Investors worried about new signs of a slowdown in China and a flare-up in tensions between Saudi Arabia and Iran. That sent the price of oil on another wild ride.
The Dow Jones Industrial Average clawed back the worst of an early decline but still ended with its worst loss in two weeks.
The Dow slumped 276 points, or 1.6 percent, to 17,148. It was down 468 earlier.
The Standard & Poor’s 500 index lost 31 points, or 1.5 percent, to 2,012. The Nasdaq composite fell 104 points, or 2.1 percent, to 4,903.
China’s main index plunged nearly 7 percent, triggering a trading halt, after manufacturing slumped again.