Medicare is a social insurance program that serves more than 44 million enrollees (as of 2008). The program costs about $432 billion, or 3.2% of GDP, in 2007.
The definition of an institution is an established custom or practice, or a group of people that was formed for a specific reason or a building that houses the group of people. 1  Marriage is an example of a cultural institution. 2  A town council is an example of an institution of government.
A financial institution is an establishment that conducts financial transactions such as investments, loans and deposits. Almost everyone deals with financial institutions on a regular basis. Everything from depositing money to taking out loans and exchanging currencies must be done through financial institutions. Here is an overview of some of the major categories of financial institutions and their roles in the financial system.