U.S. investors got a serious jolt Monday when the Dow Jones industrial average tumbled 1,000 points minutes after the market opened in a wave of selling that circled the globe after a historic plunge in Chinese stocks.
Though the declines eased significantly as the morning went on, it sent a shiver of fear through Americans with retirement accounts or saving to buy a home that the bull market is over.
The Dow was down 199 points, or 1.2 percent, to 16,259 points as of 12:51 p.m. Eastern time. The S&P 500 dropped 27 points, or 1.4 percent, to 1,943. The Nasdaq composite fell 43 points, or 0.9 percent, to 4,662 points. The three indexes are down for the year.
The Standard & Poor's 500 index briefly slid into correction territory after the opening - Wall Street jargon for a drop of 10 percent or more from a recent peak. The last market correction was four years ago. Treasurys surged as investors bought less risky assets.
The Dow fell 1,089 points within the first four minutes of trading as traders dumped shares. But the fire sale was short-lived. A wave buying cut the Dow's losses by half just five minutes later.
Heightened concern about a slowdown in China had already shaken markets around the world on Friday, driving the U.S. stock market sharply lower. A big sell-off in Chinese stocks on Monday caused the rout to continue.
That's left investors unsure of how to gauge which companies might be a good bet to weather a slowdown in China.
"What's a company that's doing business with China actually worth right now? When you're not sure, you tend to sell," said JJ Kinahan, TD Ameritrade's chief strategist.
China's main index sank 8.5 percent amid fears over the health of the world's second-largest economy.
Oil prices, commodities and the currencies of many developing countries also tumbled on concerns that a sharp slowdown in China might hurt economic growth around the globe.
The market slide was broad. All the sectors in the S&P 500 headed lower, with consumer staples notching the biggest decline, 1.7 percent.
Citrix Systems was down the most among stocks in the S&P 500, shedding $4.62, or 6.2 percent, to $69.36. AGL Resources led among the gainers, rising $14.11, or 29.5 percent, to $62.
In Europe, Germany's DAX fell 4.7 percent, while the CAC-40 in France slid 5.4 percent. The FTSE 100 index of leading British shares dropped 4.7 percent.
The Shanghai index suffered its biggest percentage decline since February 2007, with many China-listed companies hitting their 10 percent downside limits. The benchmark has lost all of its gains for 2015, though it is still more than 40 percent above its level a year ago.
Underlying the gloom in China is the growing conviction that policymakers and regulators may lack the means to stem the losses in that nation. The country is facing a slowdown in economic growth, the banking system is short of cash and investors are pulling money out of the country, experts note.
"There is a lot of fear in the markets," said Bernard Aw, market strategist at IG.
China's dimming outlook is drawing calls for more economic stimulus from Beijing, though earlier government efforts to stop the sell-off in stocks appear to have done little to stabilize markets.
The bloodletting spread across Asia earlier, where Japan's Nikkei fell 4.6 percent, its worst one-day drop since in over two and a half years. Hong Kong's Hang Seng index fell 5.2 percent, Australia's S&P ASX/200 slid 4.1 percent and South Korea's Kospi lost 2.5 percent.
Those declines followed tumbles over the weekend in emerging markets such as Egypt, Dubai and Saudi Arabia.
The panic has underscored the scale of the challenge for Chinese leaders in seeking to curb excess investment and guide the economy toward a more sustainable pace of growth.
"My biggest concern is that global growth momentum is very fragile. The most important step is to see China take further action to try to bring their economy to a 7 percent growth path," said Rajiv Biswas, Asia-Pacific chief economist for IHS.
In currency trading, the dollar was at 119.25 yen on Monday, down from 122.05 yen on Friday. The euro rose to $1.1532 from $1.1138. Currencies fell hard in developing economies - particularly those that rely heavily on the export of commodities and oil, both of which China is a big consumer.
In commodity markets, benchmark U.S. crude dropped $1.48, or 3.7 percent, to $38.97 a barrel in New York. It fell 87 cents a barrel on Friday. Brent crude, a benchmark for international oils used by many U.S. refineries, fell $2.50 to $42.96 a barrel.
U.S. government bond prices rose. The yield on the 10-year Treasury note fell to 2.03 percent.