The merger yesterday (Tuesday) of Germany's Deutsche Boerse AG and NYSE Euronext Group (NYSE: NYX ) will create the world's largest financial exchange. But most observers feel the deal is being driven more by the exploding market in derivatives and other exotic instruments than good old-fashioned stock trading. While the $9.53 billion all-stock deal creates the world's largest trader of equities, it's the chance to exp and the combined entity's presence in derivatives markets that held the real appeal, according to most observers. Under the terms of the deal, Deutsche Boerse shareholders will control 60% of the new company, with NYSE shareholders owning 40%. One Deutsche Boerse share will be exchanged for one share of the new company's stock, while each share of NYSE Euronext will be swapped for 0.47 share of new company stock, The Wall Street Journal reported .