Stocks jumped more than 2 percent at the open on Thursday after European leaders agreed to boost the region's bailout fund and struck a deal with banks and insurers to accept 50 percent losses on Greek bonds.

The Dow Jones industrial average gained 258.00 points, or 2.17 percent, to 12,127.04. The Standard & Poor's 500 Index jumped 30.31 points, or 2.44 percent, to 1,272.31. The Nasdaq Composite Index climbed 67.87 points, or 2.56 percent, to 2,718.54.

(Reporting by Chuck Mikolajczak; editing by Jeffrey Benkoe)