Ask people which is the most important structure that keeps the US capital markets humming day after day, and most will likely erroneously say the New York Stock Exchange, which however over the past decade has transformed from its historic role into nothing more than a TV studio for financial cable networks. Some might be closer to the truth and say that the most important building is the true New York Stock Exchange located in Mahwah, New Jersey however that also is not true as the NYSE now accounts for just a small fraction of total traded volume.