Stock Trading

The stock market rebounded as traders placed bets that the outcome of an election in Massachusetts would make it harder for President Barack Obama to make changes to health care. The vote Tuesday to fill the seat of late Sen. Edward M. Kennedy could shift power in the Senate if Republican Scott Brown wins. That would give Republicans the 41 votes necessary to block Democratic proposals, including the health care bill. Polls were set to close four hours after the closing bell on Wall Street.

U.S. markets were closed Monday for Martin Luther King Jr. Day.

The Dow Jones industrial average rose 115.78, or 1.1 percent, to 10,725.43.

The Standard & Poor's 500 index rose 14.20, or 1.3 percent, to 1,150.23.

The Nasdaq composite index rose 32.41, or 1.4 percent, to 2,320.40.

For the year:

The Dow is up 297.38, or 2.9 percent.

The S&P is up 35.13, or 3.2 percent.

The Nasdaq is up 51.25, or 2.3 percent.