• The broad-based S&P 500 jumped 3.2 percent to 2,953.91, while the tech-rich Nasdaq Composite Index gained 2.4 percent to 9,234.83.

The Dow Jones Industrial Average piled on more than 900 points, or 3.9 percent, to 24,597.37.

The broad-based S&P 500 jumped 3.2 percent to 2,953.91, while the tech-rich Nasdaq Composite Index gained 2.4 percent to 9,234.83.