The S&P 500 jumped 2.1 percent. The Dow Jones Industrial Average climbed 674 points, or 1.7 percent, and the Nasdaq composite jumped 2.6 percent.

U.S. stocks rallied to their best day in months on Friday as Wall Street’s roller coaster suddenly shot back upward. That still wasn’t enough to keep the U.S. market from a fourth straight losing week, its longest such streak since August.

U.S. stocks rallied to their best day in months on Friday as Wall Street’s roller coaster suddenly shot back upward. That still wasn’t enough to keep the U.S. market from a fourth straight losing week, its longest such streak since August.