It was another extremely volatile session with the Dow tanking more than 400 points at its worst on Thursday. Benchmark indexes did recover from the day's lows, though closed in the red. Crude oil suffered as well, ending at its lowest settlement since May 2003. Boeing (BA) tumbled on news the SEC had launched an investigation. Regulators are reportedly looking into accounting irregularities associated with expected sales of its 787 and 747 aircraft. Pandora Media (P) trading was briefly halted on reports of sales talks. The music streaming company has reportedly held meetings with potential buyers, though negotiations are still preliminary. The Fresh Market (TFM) surged to session highs on reports Kroger (KR) is interested in an acquisition.