Common money market instruments

Bankers' acceptance - A draft issued by a bank that will be accepted for payment, effectively the same as a cashier's check.
Certificate of deposit - A time deposit at a bank with a specific maturity date; large-denomination certificates of deposits can be sold before maturity.
Repurchase agreements - Short-term loans—normally for less than two weeks and frequently for one day—arranged by selling securities to an investor with an agreement to repurchase them at a fixed price on a fixed date.
Commercial paper - An unsecured promissory notes with a fixed maturity of one to 270 days; usually sold at a discount from face value.
Eurodollar deposit - Deposits made in U.S. dollars at a bank or bank branch located outside the United States.
Federal Agency Short-Term Securities - (in the US). Short-term securities issued by government sponsored enterprises such as the Farm Credit System, the Federal Home Loan Banks and the Federal National Mortgage Association.
Federal funds - (in the US). Interest-bearing deposits held by banks and other depository institutions at the Federal Reserve; these are immediately available funds that institutions borrow or lend, usually on an overnight basis. They are lent for the federal funds rate.
Municipal notes - (in the US). Short-term notes issued by municipalities in anticipation of tax receipts or other revenues.
Treasury bills - Short-term debt obligations of a national government that are issued to mature in 3 to 12 months. For the U.S., see Treasury bills.
Money market mutual funds - Pooled short maturity, high quality investments which buy money market securities on behalf of retail or institutional investors.
Foreign Exchange Swaps - Exchanging a set of currencies in spot date and the reversal of the exchange of currencies at a predetermined time in the future.