After the "buck was broken" money maekt funds are still trying to prevent regulation.
From the NY Times.
"Currently, money market funds — unlike all other mutual funds — try to appear to be risk-free. The funds have net asset values per share of exactly $1, and “breaking the buck” is widely feared. The S.E.C. rules allow the funds to maintain that dollar value so long as the real value is at least 99.5 cents".