High Frequency Trading Marks High Water of Financial Corruption

When a person or firm makes too much money for too long, it turns heads. And so it was with Steven A. Cohen. Year after year, Cohen's firm, SAC Capital, beat the Street. Big bets, the theory went. Others were not so sure. Big bets generally cut both ways, as many hedge fund managers learned over the years, and even the best in the world, such as John Paulson and Paul Tutor Jones, had their hard times. But such was not the case with Cohen. SAC Capital was the envy of the industry, posting 30% ann...