Stocks slide to start the week as omicron fears intensify, Dow falls 430 points; European markets close lower as omicron worries intensify; Stoxx 600 down 1.4% 
The major averages fell on Monday as investors grappled with the resurgence of Covid cases spurred from the newfound omicron variant. 
The Dow Jones Industrial Average dropped 433.28 points to 34,932.16, dragged down by losses in Boeing, Goldman Sachs and American Express. The S&P 500 dipped 1.1% to 4,568.02 and the technology-focused Nasdaq Composite declined 1.2% to 14,980.94. The small-cap benchmark Russell 2000 lost nearly 1.6%. 

The pan-European Stoxx 600 provisionally ended the session around 1.4% lower, with autos shedding 2.7% to lead losses as all sectors and major bourses slid into negative territory. 
At the bottom of the Stoxx 600, Danish drugmaker Novo Nordisk tumbled over 11% after announcing Friday that it would be unable to meet demand for its new weight loss drug amid supply problems in the U.S. 
In terms of individual share price movement, Belgian biotech firm Argenx jumped more than 8% after the U.S. Food and Drug Administration approved a landmark drug. 
Source: CNBC, Investing.com