Meanwhile, Deutsche Boerse would face similar constraints if it decided to make its own clearing provider, Eurex Clearing, the main provider for the LSE.

BBC: The watchdog's report could spark further bids for the LSE

The report shows that in November 2007, Eurex, a clearing house, raised questions about the trades.

ECONOMIST: Soci��t�� G��n��rale

Katz serves on the executive board of Eurex and also represents the ISE on the board of directors of The Options Clearing Corp.

FORBES: Magazine Article