The first money market mutual fund to break the buck was First Multifund for Daily Income (FMDI) in 1978, liquidating and restating NAV at 94 cents per share. An argument has been made that FMDI was not technically a money market fund as at the time of liquidation the average maturity of securities in its portfolio exceeded two years. However, prospective investors were informed that FMDI would invest "solely in Short-Term (30-90 days) MONEY MARKET obligations". Furthermore, the rule restricting which the maturities which money market funds are permitted to invest in, Rule 2a-7 of the Investment Company Act of 1940, was not promulgated until 1983. Prior to the adoption of this rule, a mutual fund had to do little other than present itself as a money market fund, which FMDI did. Seeking higher yield, FMDI had purchased increasingly longer maturity securities, and rising interest rates negatively impacted the value of its portfolio. In order to meet increasing redemptions, the fund was forced to sell a certificate of deposit at a 3% loss, triggering a restatement of its NAV and the first instance of a money market fund "breaking the buck".
Mutual funds continue to be among the most popular investing tools for both individual and professional investors who seek to beat the market or simply access a broad swath of investments rather than purchase stocks or bonds individually. Unlike stocks or exchange-traded funds, mutual funds trade just once per day, and many investors own them as part of a defined contribution retirement plan such as a 401(k) or an individual retirement account, known as an IRA. The price of a mutual fund share is known as the fund's net asset value, or NAV.
While they sound highly similar, a money market fund is not the same as a money market account (MMA). The former is an investment, sponsored by an investment fund company, and hence carries no guarantee of principal. The latter is an interest-earning saving account offered by financial institutions, with limited transaction privileges and insured by the Federal Deposit Insurance Corporation (FDIC).
The Money Market enables the commercial banks to use their excess reserves in profitable investment. The main objective of the commercial banks is to earn income from its reserves as well as maintain liquidity to meet the uncertain cash demand of the depositors. In the money market, the excess reserves of the commercial banks are invested in near-money assets (e.g., short-term bills of exchange), which are easily converted into cash. Thus, commercial banks earn profits without sacrificing liquidity.