Bank stocks ignite big rally

(CNNMoney.com) -- Stocks surged Wednesday, with the Dow jumping as much as 283 points, as investors came back after the recent bloodletting, spurred on by State Street's improved earnings forecast.

A stronger euro helped propel commodity shares, cooling some worries about the European debt crisis.

The Dow Jones industrial average (INDU) gained 275 points, or 2.8%, its biggest one-day point and percentage gain since June 10.

The S&P 500 (SPX) gained 32 points, or 3.1% for its biggest one-day point and percentage gain since May 27. The Nasdaq (COMP) composite gained 65 points, or 3.1%, its biggest one-day point and percentage gain since May 10. (more)