CFTC head: market complexity a factor in time taken to charge trader

U.S. financial markets' size and complexity were a factor in how long it took to bring charges against a British trader accused of contributing to Wall Street's "flash crash" nearly five years ago, the head of the U.S. Commodity Futures Trading Commission said on Wednesday. "Sometimes it takes a long time to put cases together," CFTC Chairman Tim Massad said in response to questions following a speech he delivered at a derivatives industry conference in Chicago. On Tuesday, the CFTC filed civil