Reasons for the Act - Commercial Speculation
Commercial banks were accused of being too speculative in the pre-Depression era, not only because they were investing their assets but also because they were buying new issues for resale to the public. Thus, banks became greedy, taking on huge risks in the hope of even bigger rewards. Banking itself became sloppy and objectives became blurred. Unsound loans were issued to companies in which the bank had invested, and clients would be encouraged to invest in those same stocks.
Effects of the Act - Creating Barriers
Senator Carter Glass, a former Treasury secretary and the founder of the U.S. Federal Reserve System, was the primary force behind the GSA. Henry Bascom Steagall was a House of Representatives member and chairman of the House Banking and Currency Committee. Steagall agreed to support the act with Glass after an amendment was added permitting bank deposit insurance (this was the first time it was allowed).
As a collective reaction to one of the worst financial crises at the time, the GSA set up a regulatory firewall between commercial and investment bank activities, both of which were curbed and controlled. Banks were given a year to decide on whether they would specialize in commercial or in investment banking. Only 10% of commercial banks' total income could stem from securities; however, an exception allowed commercial banks to underwrite government-issued bonds. Financial giants at the time such as JP Morgan and Company, which were seen as part of the problem, were directly targeted and forced to cut their services and, hence, a main source of their income. By creating this barrier, the GSA was aiming to prevent the banks' use of deposits in the case of a failed underwriting job.
The GSA, however, was considered harsh by most in the financial community, and it was reported that even Glass himself moved to repeal the GSA shortly after it was passed, claiming it was an overreaction to the crisis.
Building More Walls
Despite the lax implementation of the GSA by the Federal Reserve Board, which is the regulator of U.S. banks, in 1956, Congress made another decision to regulate the banking sector. In an effort to prevent financial conglomerates from amassing too much power, the new act focused on banks involved in the insurance sector. Congress agreed that bearing the high risks undertaken in underwriting insurance is not good banking practice. Thus, as an extension of the Glass-Steagall Act, the Bank Holding Company Act further separated financial activities by creating a wall between insurance and banking. Even though banks could, and can still can, sell insurance and insurance products, underwriting insurance was forbidden.