U.S. stocks rallied and won back most of their sharp loss from last week. The S&P 500 jumped 1.5% Monday to follow up its worst day since May with its best since May.

The S&P 500 jumped 1.3 percent in afternoon trading to claw back more than three quarters of Friday’s drop. The Dow Jones Industrial Average was up 507 points, or 1.2 percent, with an hour remaining in trading, and the Nasdaq composite was 1.8 percent higher.