Money market mutual fund
Money market mutual fund means any security issued by an investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8) that is considered a money market fund under SEC Rule 2a-7 (17 CFR 270.2a-7).
12 CFR § 220.2
The terms used in this part have the meanings given them in section 3 of the Act or as defined in this section as follows: