For the past year, the NYSE's main office building has been a construction site. First, the Garage, one of the two main rooms on the trading floor, was completely renovated and reopened in January.

But the bigger disruption has been for the 800 or so NYSE staff, who have been moved out of the 17-story 11 Wall St. office and into temporary offices next door while the entire building was torn apart and renovated, the first large-scale renovation in many decades.