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Finance Dictionary and Glossary of Investment Terms
money market mutual fund
An open-end mutual fund which invests only in money markets. These funds invest in short term (one day to one year) debt obligations such as Treasury bills, certificates of deposit, and commercial paper. The main goal is the preservation of principal, accompanied by modest dividends. The fund's net asset value remains a constant $1 per share to simplify accounting, but the interest rate does fluctuate. Money market mutual funds are very liquid investments, and therefore are often used by financial institutions to store money that is not currently invested. Unlike bank accounts and money market accounts, most deposits are not FDIC insured, but the risk is extremely low (only those funds administered by banks are FDIC-insured, but some others are privately insured). Although money market mutual funds are among the safest types of mutual funds, it still is possible for money market mutual funds to fail, but it is unlikely. In fact, the biggest risk involved in investing in money market funds is the risk that inflation will outpace the funds' returns, thereby eroding the purchasing power of the investor's money. also called money fund or money market fund.