The floor of the New York Stock Exchange (NYSE) is viewed on December 20, 2012 in New York City. Founded in 1817, New York Stock Exchange has agreed to an $8.2 billion takeover from IntercontinentalExchange (ICE). NYSE Euronext, the stock exchange&#39;s holding company, has agreed to an offer of $33.12 a share in cash and stock from the Atlanta-based energy trader.