NYSE Euronext is an American corporation that owns and manages several stock exchanges, including the NYSE, Euronext (Europe), and NYSE Arca (formerly Archipelago). The company's revenue is generated through the number of listings (companies on the exchange) and the number of trades executed.
The NYSE is the largest exchange in the world; it has nearly twice the transaction volume as NASDAQ, it's main competitor, and approximately four times the combined market capitalization of its listed companies. However, its competitors have begun to take over its trading market share as they develop new trading technologies. NYX has begun to implement new technology platforms, such as a virtual trading platform and taking its derivatives trading in-house. In addition, NYX is affected by a number of macro-economic trends because they have a direct effect on the number of listings and trades executed, such as the overall financial health of the U.S. economy. Rather than waiting for organic growth, NYX has been aggressively investing in and acquiring other stock exchanges around the world.(Read more at Wikinvest )