Question: What are the characteristics of a Money Market Fund? 

Answer: money market- are the short term fixed income securities, which is: Treasury bills,  that is very liquid, they are trading in big denominations, its zero-coupon bonds. Money market Fund means that you can invest a little amount of money while institutions will by this Treasury bills and pay you the difference. But i would not advice to invest in them that is government-no risk-less yield.
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