Updated at 4:55 p.m. ET
The stock market went on a wild ride again on Monday, with the Dow Jones industrial average closing down 1,175 points, its worst point drop in history. The Dow closed down 4.6 percent and turned negative for the year.
At one point Monday afternoon, the Dow was down 1,579 points — the largest intraday point drop in the history of the index.