U.S. stock indexes plunged almost 4 percent on Monday as investors, rattled about China's economy, sold heavily in an unusually volatile session that confirmed the benchmark S&P 500 was formally in a correction.
The Dow Jones industrial average briefly slumped more than 1,000 points — its most dramatic intraday trading range ever — with key component Apple falling heavily only to claw back but end down 2.5 percent.
It was the S&P 500's worst day since 2011 and followed an 8.5 percent slump in China markets, which sparked a sell-off in global stocks along with oil and other commodities.