(Reuters) - Stocks fell for a third day and hit their lowest level in two weeks on Wednesday as widespread risk aversion sent commodity prices tumbling, drove the euro to its lowest in a year and forced Italy to pay a euro-era high to sell debt.

Based on the latest available data, the Dow Jones industrial average .DJI fell 131.39 points, or 1.10 percent, to end unofficially at 11,823.55. The Standard & Poor's 500 Index .SPX lost 13.91 points, or 1.13 percent, to finish unofficially at 1,211.82. The Nasdaq Composite Index .IXIC dropped 39.96 points, or 1.55 percent, to close unofficially at 2,539.31.