Capital market reactions to the passage of the Financial Services Modernization Act of 1999

The Financial Services Modernization Act of 1999, also known as the Gramm-Leach-Bliley Act (GLBA), removed most of the remaining barriers between financial companies. Stock market reactions to the passage of GLBA vary across financial sectors and company size. Specifically, we find negative returns for foreign banks, thrifts and finance companies; insignificant returns for banks; and positive returns for investment banks and insurance companies. Additionally, larger nondepository firms have higher returns. The return variation reflects resolution of uncertainty surrounding the final provisions of GLBA, competitive pressures, and expectations of future business combinations. Potential gains from business combinations may arise from economies of scope, market power, and/or from an implicit extension of government guarantees to banking affiliates.