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How to choose a money market fund 
Decide if money market funds are right for you. 
Before investing in a money market mutual fund (mmf), you'll have to make sure that doing so is the right move for you. At a basic level, money market funds operate similarly to savings accounts.
They are low-risk accounts that earn a relatively steady interest rate over time and can be withdrawn from. However, the actual withdrawal process is not as simple as visiting your bank and asking for a withdrawal.