FILE - In this Friday, Aug. 3, 2012 file photo, Knight Capital specialists work at their posts on the floor of the New York Stock Exchange. Knight Capital announced Monday, Aug. 6, 2012, that investors have agreed to supply it with $400 million in financing, which would help the trading firm stay in business after last week's disastrous software glitch that shook U.S. stock trading and jeopardized its future. (AP Photo/Richard Drew, File)