Money market funds only invest in money market instruments, and the net share value is always maintained at one yuan, which has the characteristics of low risk, low income, high liquidity and low cost. Money market funds are called quasi-savings, which can be used as a good substitute for bank deposits and a tool for cash management. Therefore, when you buy a money fund, it is a one-yuan face value. It is a fund variety that pays the income to your account every month and then reinvests the dividend. It is a fund that can be redeemed at any time when money is urgently needed without losing investment income. Like other open-end funds, money funds can be purchased after opening a fund account in a bank. 1000 yuan. You can put 100 yuan in later. Opening a fund account is free. Money funds are also free investments. The interest rate is similar to that of bank time deposits. It's a current deposit and withdrawal, with a fixed interest rate.