The ICI conducts a weekly survey and provides the Federal Reserve with the net value of total shares outstanding (total assets less expenses and management fees) of money market mutual funds (MMMFs).
The Federal Reserve uses the MMMF data to construct the M2 monetary aggregate and to analyze current money market conditions. The monetary aggregates are published in the weekly H.6 Money Stock and Debt Measures statistical release
and in the Federal Reserve Bulletin. Retail and institutional MMMF data, along with IRA/Keogh balances at MMMFs, also are published as separate items on the H.6 release.