Like a traditional savings account, there's no set term for maturity with a money market account — you can park cash for an unlimited amount of time. But the way the institution can use your money is different from a savings account.Banks and credit unions can use the money deposited into money market accounts for low-risk investments, like certificates of deposit, Treasury notes and government-backed bonds. Institutions can mainly use the money deposited into traditional savings accounts for loans.
Looking closer we see that if you can meet the $3,000 minimum investment size, Vanguard’s VMMXX offers an appealing combination of relatively high returns with low expenses. If you don’t have a large amount of cash to invest, you should note that both FMPXX and FIDXX have $1MM investment minimums. If you have less than $1,000, SPRXX doesn’t meet the yield and expense ratio thresholds we laid out, but it doesn’t have an investment minimum.