The New York Stock Exchange (NYSE; abbreviated: NYSE, NYSE) is the world's number one exchange in terms of total market capitalization of listed companies, number one in terms of IPOs and market capitalization, and number two in terms of trading volume, and is one of the four largest exchanges in the world (the other three are, , respectively). in April 2005 On June 1, 2006, NYSE and Euronext merged to form NYSE Euronext, Inc.