MMFs overwhelmingly retained their existing ratings, and the credit rating agencies have confirmed their commitment to the MMF-specific rating criteria they each maintain. A major difference in scope is that, on a like-for-like basis, US MMFs may be compared only to EU short-term MMFs. See also Bond fund Income fund Money market Money supply Shadow banking system Stable value fund Stock fund Sweep account Target date fund References External links ICI Fact Book Definition of a Money Market Fund and Difference Between Money Market Account Joan Ohlbaum Swirsky, The Guide to Rule 2a-7: A Map Through the Maze for the Money Market Professional (3rd ed., 2017) How to invest in the money market Money markets Mutual funds Subprime mortgage crisis