Stocks rose one day after the biggest market declines in four years as investors appeared confident the fundamental outlooks in the U.S. and global economies are still sound.

Investors took cues from Fed Chairman Ben Bernanke, who soothed investors with positive comments on the U.S. economy when he testified before Congress Wednesday morning. Bernanke said no single trigger caused Tuesday's stock stock meltdown and the economy remains stable with "no material change in our expectations."