Abbreviated CFIUS. An inter-agency committee of the United States Government that reviews the national security implications of foreign investments of U.S. companies or operations. It is chaired by the Secretary of the Treasury, and includes representatives from 16 U.S. departments and agencies, including the Defense, State and Commerce departments, as well as the Department of Homeland Security. CFIUS was established by President Gerald Ford's Executive Order 11858 in 1975. The committee gained additional authority after Ronald Reagan delegated Presidential oversight to CFIUS by his Executive Order 12661 in 1988. This was in response to U.S. Congress giving authority to the President to review foreign investments, in the form of Exon-Florio Amendment.