Federal financial regulation in the United States has evolved through a series of piecemeal responses to developments and crises in financial markets. This report provides an overview of current U.S. financial regulation: which agencies are responsible for which institutions and markets, and what kinds of authority they have. There are two traditional components to U.S. banking regulation: deposit insurance and adequate capital. Commercial banks accept a quid pro quo that was adopted in response to widespread bank failures during the 1930s.