The S&P 500 entered correction territory on Monday following Wall Street’s worst week since the start of the pandemic.

The S&P 500, which is heading for its worst month since March 2020, closed up after a tumultuous day for the markets in which the index entered correction territory, meaning that it was more than 10% off from its record closing high earlier this month. The Dow Jones Industrial Average, which at one point was down more than 1,000 points on Monday, staged a late-day rebound, turning positive and closing slightly up after a wild intraday swing.