Shares of the NYSE Group (NYSE:NYX) have soared close to 15% since they hit a short-term low on March 16th. There are several catalysts behind this move:

First, exchange shares were hit harder than most during the broader market decline in late February. Fundamentally, however, the short-term market dip is unlikely to have a major impact on revenues at NYSE. In fact, trading volume on the exchange actually surged to near-record levels during that decline -- and higher volumes spell more fees for NYX.

It also helps that the company is now completing its planned takeover of Europe's Euronext. The tender offer for Euronext ended in late March, and NYX announced it currently controls more than 92% of Euronext shares. Over the next three years, NYX believes it can extract some 293 million euros ($385 million) from the deal in the form of cost savings and other synergies. In addition, the deal will also facilitate trans-Atlantic trading in stocks and options. Many see the deal as a major positive, and a potential growth avenue for NYX.