German stock market operator Deutsche Boerse said Monday its net profit doubled last year to 848 million euros ($1.1 billion) and that prospects for 2012 were good despite the failure of a merger with NYSE Euronext. \"Deutsche Boerse Group achieved its best sales revenue performance since record year 2008,\" the Frankfurt stock market operator said in a statement. Sales increased by six percent to 2.2 billion euros. \"After the EU Commission’s decision, our view is exclusively forward,\" Deutsche Boerse chief executive Reto Francioni said in a statement, saying it would accelerate its growth strategy into unregulated markets. \"Our outlook for 2012 is positive,\" he added. Earlier this month Deutsche Boerse and NYSE Euronext cancelled their mega-merger after European regulators vetoed their plan to create the world\'s largest exchange operator over concerns it would potentially dominate the global derivatives trade.