COMMODITIES

CBOT Files Charges in Wheat Price Spikes: Details of the Chicago Board of Trade charges, leveled against a number of its members last week, were not available. Their existence was disclosed at a Senate Agriculture Committee hearing into market strains caused by huge price swings and high volumes of grain trading. Regulators said the charges revolve around trading on March 20, when traders had to liquidate their March contracts. But rather than closing one or two minutes after noon, as allowed for expiring contracts, trading extended to within 10 seconds of 12:03 p.m., officials said. A finding by the board’s disciplinary committee will be issued in two to three months.