Twitter IPO at the NYSE

Twitter co-founder Jack Dorsey, Twitter co-founder Biz Stone, Twitter co-founder Evan Williams and Twitter CEO Dick Costolo stand on the floor of the NYSE after shares of Twitter are traded for the first time at the New York Stock Exchange on Wall Street In New York City on November 7, 2013. The NYSE Euronext staged a first-ever weekend test for the initial public offer two weeks ago to avoid reprising the problems with rival Nasdaq's systems that delayed timely orders and ruined Facebook's debut on Wall Street. UPI/John Angelillo