A late surge pushed the stock market sharply higher after a report said major central banks would be ready to pump money into the financial system if needed. The Reuters report said major central banks were preparing for coordinated action if the results of Greek elections on Sunday strain global financial markets.
The Dow Jones industrial average jumped 155.53 points, or 1.2 percent, to close at 12,651.91.
The Standard & Poor's 500 rose 14.22 points, or 1.2 percent, to 1,329.10.
The Nasdaq composite rose 17.72 points to 2,836.33.
For the week:
The Dow is up 97.71 points, or 0.8 percent.
The S&P 500 is up 3.44 points, or 0.3 percent.
The Nasdaq is down 22.09 points, or 0.8 percent.
For the year:
The Dow is up 434.35 points, or 3.6 percent.
The S&P 500 is up 71.50 points, or 5.7 percent.
The Nasdaq is up 231.18 points, or 8.9 percent.