EU Blocks Deutsche Boerse, NYSE Euronext Deal

11:00 AM ET Wed, 1 Feb 2012

Steve Grob, director of group strategy at Fidessa, told CNBC, " I think NYSE is in a better shape because it is already operating an existing international franchise, but I think the big worry for both of them is that now the lid is off the whole issue of competition in derivatives, does that mean that regulators are going to look further at their fairly lucrative derivative clearing businesses."