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"Citigroup is investigating a rumour that an erroneous trade precipitated a drop of almost 1,000 points in the Dow Jones Industrial Average on Thursday, a bank spokesperson said. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.france24.com/en/20100506-dow-jones-900-points-drop-europe-markets-greek-debt-fears>