Stocks slumped and bonds rallied as concern over the impact of a deadly virus that originated in China rattled global markets.
The S&P 500 Index fell the most in almost four months, the Dow Jones Industrial Average erased its 2020 gain and the Nasdaq-100 Index had the biggest drop since August. Chipmakers, cruise lines and casino operators were among the hardest hit as investors fled companies with close links to China. A gauge of U.S. equity volatility surged above its one-year average. European and emerging-market shares slid to the lowest since mid-December.