NYSE Euronext announced Thursday the termination of its mega-merger deal with German stock exchange Deutsche Boerse after European regulators vetoed the deal.

"NYSE Euronext announced today that in light of the decision by the European Commission to block the proposed merger agreement, both companies have agreed to a mutual termination of the business combination agreement originally signed by the companies on February 15, 2011," NYSE said in a brief statement.

The European Commission issued a verdict Wednesday saying no to the proposed merger between Deutsche Boerse and NYSE Euronext.

According to a statement by the Commission, the proposed merger "would have resulted in a quasi-monopoly in the area of European financial derivatives traded globally on exchanges."

NYSE Euronext and Deutsche Boerse approved in July 2011 the 9. 53-billion-dollar takeover deal, which would have created the world's biggest exchange group.