Updated at 4:22 p.m. ET
An emergency interest-rate cut by the Federal Reserve failed to mollify investors worried about the coronavirus epidemic, and stocks once again plummeted.
The Dow Jones Industrial Average ended down 786 points, a drop of 2.94% after an especially volatile trading day.
All the major indexes have lost more than 10% of their value since their all-time highs, moving back into what the market calls a correction.