Oil ETFs and crude futures fell because of economic worries, ETF Trends reports. The U.S. Oil Fund stocks dropped 0.9 percent and the U.S.12 Month Oil fund stocks fell 2.5 percent. The U.S. market sell-off on September 6 followed the market decline in European markets the previous day as investors raised concerns that European debt crisis could lead to recession. Jim Ritterbusch, head of trading advisory firm Ritterbusch and Associates, said oil demand will fall short of most expectations in the second half of this year.

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