trading business lines. During their tenure as co-senior partners, the firm introduced paperless trading to the New York Stock Exchange and lead-managed the first-ever global debt offering by a U.S. corporation. In 1994, it also launched the Goldman Sachs Commodity Index (GSCI) and opened its first office in China in Beijing. That same year, Jon Corzine became CEO, following the departure of Rubin and Friedman. Rubin had drawn criticism in Congress for using a Treasury Department account under his personal control to distribute $20 billion to bail out Mexican bonds, of which Goldman was a key distributor. On November 22, 1994, the Mexican Bolsa stock market admitted Goldman Sachs and one other firm to operate on that market. The 1994 economic crisis in Mexico threatened to wipe out the value of Mexico's bonds held by Goldman Sachs. In 1994, Goldman financed Rockefeller Center in a deal that allowed it to take an ownership interest in 1996, and sold Rockefeller Center to Tishman Speyer in 2000. In April 1996, Goldman was the lead underwriter of the Yahoo! IPO. In 1998, it was the co-lead manager of the ¥2 trillion (yen) NTT DoCoMo IPO. In 1999, Goldman acquired Hull Trading Company for $531 million. After decades of debate among the partners, the company became a public company via an initial public offering in May 1999. Goldman sold 12.6% of the company to the public, and after the IPO, 48.3% of the company was held by 221 former partners, 21.2% of the company was held by non-partner employees, and the remaining 17.9% was held by retired Goldman partners and two long-time investors, Sumitomo Bank Ltd. and Assn, the investing arm of Kamehameha Schools. The shares were priced at $53 each at listing. After the IPO, Henry Paulson became Chairman and Chief Executive Officer, succeeding Jon Corzine. 21st century In September 2000, Goldman Sachs purchased Spear, Leeds, & Kellogg, one of the largest specialist firms on the New York Stock Exchange, for $6.3 billion. In January 2000, Goldman, along with Lehman Brothers, was the lead manager for the first internet bond offering for the World Bank. In March 2003, the firm took a 45% stake in a joint venture with JBWere, the Australian investment bank. In April 2003, Goldman acquired The Ayco Company L.P., a fee-based financial counseling service. In December 2005, four years after its report on the emerging "BRIC" economies (Brazil, Russia,