Federal Reserve $FOMC The Federal Open Market Committee (FOMC) is a committee within the Federal Reserve System (the Fed) that is charged under United States law with overseeing the nation's open market operations (e.g., the Fed's buying and selling of United States Treasury securities). This Federal Reserve committee makes key decisions about interest rates and the growth of the United States money supply. Under the terms of the original Federal Reserve Act, each of the Federal Reserve banks was authorized to buy and sell in the open market bonds and short term obligations of the United States Government, bank acceptances, cable transfers, and bills of exchange.