Carnegie's share of this amounted to $225.64 million (in , $), which was paid to Carnegie in the form of 5%, 50-year gold bonds. The letter agreeing to sell his share was signed on February 26, 1901. On March 2, the circular formally filing the organization and capitalization (at $1.4 billion – 4 percent of the U.S. gross domestic product (GDP) at the time) of the United States Steel Corporation actually completed the contract. The bonds were to be delivered within two weeks to the Hudson Trust Company of Hoboken, New Jersey, in trust to Robert A. Franks, Carnegie's business secretary. There, a special vault was built to house the physical bulk of nearly $230 million worth of bonds.