The stock market's fast start has prompted some analysts to worry that the rally could quickly fizzle out. Although recent economic reports have painted a better picture, the U.S. economy is still growing slowly. It expanded at an annual rate of 0.1 percent in the final three months of 2012. And Europe remains in a recession.
There were no major economic reports to drive trading on Monday. Later in the week, the government will release figures for the federal budget in February, as well as reports on consumer prices and industrial production
On Friday, the Labor Department said that U.S. employers added 236,000 workers to their payrolls in February, pushing the unemployment rate down to 7.7 percent, the lowest since December 2008.
In the Treasury market, the yield on the benchmark 10-year Treasury note edged up to 2.05 percent from 2.04 percent late Friday.
The 10-year Treasury yield began the year around 1.70 percent and has climbed steadily higher since then as worries about a recession have eased. Traders have shifted money out of the Treasury market, lifting yields up.
Among other companies making moves Monday: