USA stocks posted their worst loss since February on Wednesday, the Dow Jones industrial average finishing the day down more than 800 points.
Investors are also anxious about the ongoing trade war with China and its impact on corporate bottom lines as well as the rising threat of higher interest rates.
Oil prices fell more than 2 percent as U.S. stocks plunged, even though energy traders anxious about shrinking supply from Iran due to U.S. sanctions and kept an eye on Hurricane Michael, which closed almost 40 percent of U.S. Gulf of Mexico output. The S&P 500 was off by 1.7 percent, putting it on pace for its first five-day losing streak in two years. "Since the market bottomed in March 2009, it's been more than 10 years of growth stocks leading the way non-stop".
The Cboe Volatility Index, a measure of expected volatility on the S&P 500, gained more than 11% to 25.50 and held close to its highest level since February. The Nasdaq composite dropped 173, or 2.2 percent, to 7,565. Some early relief over a tame report on inflation gave way to renewed selling.
The Nasdaq composite index was off 43 points beflore climbing the same amount and the S&P 500 was down 15 before edging into positive territory. It was at just 3.05 percent early last week. Jitters about those companies have led to this short-term fall, too, while drops were felt throughout the market.
Wall Street is hoping that the worst of a brutal correction will soon be over, but today's not looking much better after Wednesday's big plunge.
The pullback - particularly for tech stocks - is needed, argued Joe Heider, president of Cirrus Wealth Management. That's helped make technology stocks more volatile in the last few months.
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Last year's prize went to American Richard Thaler for studying how human irrationality affects economic theory. William Nordhaus , born 1941 in the USA, is Sterling Professor of Economics at Yale University, USA.
Meanwhile struggling retailer Sears was in focus as the Wall Street Journal reported that it was preparing to file for bankruptcy.
Tech is taking its lumps because bond yields have climbed in recent weeks, hovering at a more-than-seven-year high. Over the years, Sears has closed hundreds of stores and sold several famous brands.
USA crude settled down $1.79 at $73.17 per barrel and Brent fell $1.91 to settle at $83.09.
Bank shares were boosted as yields rose, with Citigroup and Bank of America seeing gains of 0.4 percent and 0.3 percent, respectively. Heating oil fell 1.2 per cent to $2.39 a gallon.
The dollar fell to 111.94 yen from 112.59 yen, and the euro rose to $1.1594 from $1.1525.
Globally, France's CAC 40 dropped 1 per cent and the DAX in Germany lost 0.6 per cent. Britain's FTSE 100 sank 1.3 per cent. The British pound rose to $1.3197 from $1.3146.