Tudor rings up profits on Deephaven's parent


Paul Tudor Jones II's investment team probably needn't have bothered consulting its own analysts when it came to deciding investments in ECNs, those discount trading platforms that continue to chomp away at the profit margins of the big exchanges by offering traders lower execution fees.

Tudor Investments recently made a killing on Knight Capital Group (the parent of hedge fund Deephaven Capital Management), which has been capturing a larger percentage of booming boards like Nasdaq, the American Stock Exchange and the New York Stock Exchange. In fact, Knight's stock has doubled from $7 to $14 since the start of