Money Market Securities are short-term assets typically with a maturity of one year or less. Treasury Bills (T-bills), Commercial Paper, Certificates of Deposit (CDs), and Bankers’ Acceptances are all types of Money Market Securities. These securities are generally considered to be high grade because the maturity is short and they are typically issued by large, trustworthy organizations including the United States government. This makes the risk associated with holding a Money Market Security very low. However, low risk also means low return.