US Stock Markets up today

The S&P 500, considered Wall Street’s most important indicator, bounded up 3.4 percent Monday and erased the last of its losses for 2009. And the Dow Jones industrials shot up more than 200 points and had their first finish above 8,400 since Jan. 13.

Summary:

Dow rose 214.33, or 2.6 percent, to 8,426.74

Nasdaq composite index rose 44.36, or 2.6 percent, to 1,763.56.

S.&P. 500 has bounced back nearly 33 percent.