NEW YORK – With two of its rivals set to combine into the world’s first trans-Atlantic securities market, Nasdaq Stock Market Inc. Chief Executive Bob Greifeld is expected to come under increasing pressure to pursue his own transformative deal. It’s not that he hasn’t been trying – last month, Greifeld must have been dreaming that he would be the man to stand on a stage in Britain to introduce the creation of the world’s largest stock exchange. But, the Nasdaq’s offer to buy the venerable London Stock Exchange was soundly rejected. That moment in time instead went to NYSE Group Inc. CEO John Thain on Friday. He was the one who mounted the dais at the 19th-century Paris Bourse to unveil the $9.96 billion deal to acquire Europe’s second-largest exchange – Euronext NV. The race to become the first truly global stock exchange appears to have been won by the NYSE, but Wall Street isn’t counting Greifeld out. The fierce rivalry between the Big Board and Nasdaq is expected to continue. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MORE11 theater productions to see in Southern California this week, Dec. 27-Jan. 2“The Nasdaq signaled their desire and belief in a trans-Atlantic entity first, but that’s not the way it played out,” said Bill Cline, managing director of the capital markets practice at the consulting firm Accenture. Greifeld, who declined to comment about the exchange’s future after the NYSE/Euronext deal was announced, is said to be eyeing a number of chairs. First and foremost, the prize continues to be the U.K.’s biggest stock market. The 300-year-old London Stock Exchange has been no stranger to takeover attempts. Nasdaq entered the fray with a $4.5 billion bid, and the deal’s rejection motivated Greifeld to snap up a 25.1 percent stake in the exchange to become its biggest shareholder.