U.S. equity markets tumbled Thursday, posting their worst session since June, as investors wrestled with uncertainty over the timing of a potential COVID-19 vaccine and generally positive economic data.
The Dow Jones Industrial Average fell 807 points, or nearly 3%, but recovered from a drop of s many as 1,000 points in the final hour of trading. Microsoft Inc. and Boeing Co. were among the biggest decliners while Verizon Communications Inc. posted modest gains.