The New York Stock Exchange has come a long way since it was founded under a buttonwood tree on Wall Street in 1792, but the three years since it merged with European exchange Euronext have marked probably the most dramatic period of change in its history.

The $11bn (€8.25bn) acquisition of Euronext by NYSE on April 4, 2007 was the first big transatlantic exchange deal, linking the largest US stock market with its European counterpart to form the world's largest exchange by market capitalisation.