The Gramm–Leach–Bliley Act (GLBA), also known as the Financial Services Modernization Act of 1999, is an act of the 106th United States Congress (1999–2001). It repealed part of the Glass–Steagall Act of 1933, removing barriers in the market among banking companies, securities companies, and insurance companies that prohibited any one institution from acting as any combination of an investment bank, a commercial bank, and an insurance company. With the passage of the Gramm–Leach–Bliley Act, commercial banks, investment banks, securities firms, and insurance companies were allowed to consolidate. Furthermore, it failed to give to the SEC or any other financial regulatory agency the authority to regulate large investment bank holding companies. The legislation was signed into law by President Bill Clinton.

The 106th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from January 3, 1999, to January 3, 2001, during the last two years of Bill Clinton's presidency. The apportionment of seats in the House of Representatives was based on the 1990 United States census. Both chambers maintained a Republican majority.