The High Frequency High Frequency Trading Debate

Traders work on the floor of the New York Stock Exchange on November 22, 2013. In early trading the Dow Jones Industrial Average was little changed after closing above 16,000 for the first time ever.

Felix Salmon, finance blogger for Reuters, explains the debate and the backlash - and the backlash to the backlash - about Flash Boys, Michael Lewis' new book about high-frequency trading.