ICI: MMF Assets Dip to $7.97 Trillion
The Investment Company Institute's latest weekly "Money Market Fund Assets" report shows money fund assets decreasing $6.1 billion to $7.973 trillion. Assets rose $44.8 billion to a record high $7.979 trillion the previous week and increased $6.1 billion the week before this. MMF assets are up by $670 billion, or 9.2%, over the past 52 weeks (through 9/9/26), with Institutional MMFs up $521 billion, or 12.0% and Retail MMFs up $149 billion, or 5.0%. Year-to-date in 2026, MMF assets are up by $240 billion, or 3.1%, with Institutional MMFs up $203 billion, or 4.4% and Retail MMFs up $37 billion, or 1.2%. ICI's weekly release says, "Total money market fund assets decreased by $6.10 billion to $7.97 trillion for the week ended Wednesday, September 9, the Investment Company Institute reported.... Among taxable money market funds, government funds decreased by $7.99 billion and prime funds increased by $3.47 billion. Tax-exempt money market funds decreased by $1.57 billion. ICI's stats show Institutional MMFs decreasing $7.0 billion and Retail MMFs increasing $0.9 billion in the latest week. Total Government MMF assets, including Treasury funds, were $6.578 trillion (82.5% of all money funds), while Total Prime MMFs were $1.246 trillion (15.6%). Tax Exempt MMFs totaled $149.4 billion (1.9%). It explains, "Assets of retail money market funds increased by $891 million to $3.11 trillion. Among retail funds, government money market fund assets increased by $490 million to $1.98 trillion, prime money market fund assets increased by $1.38 billion to $994.54 billion, and tax-exempt fund assets decreased by $979 million to $136.94 billion." Retail assets account for 39.1% of the total, and Government Retail assets make up 63.7% of all Retail MMFs. They add, "Assets of institutional money market funds decreased by $6.99 billion to $4.86 trillion. Among institutional funds, government money market fund assets decreased by $8.48 billion to $4.59 trillion, prime money market fund assets increased by $2.09 billion to $251.10 billion, and tax-exempt fund assets decreased by $592 million to $12.41 billion." Institutional assets accounted for 60.9% of all MMF assets, with Government Institutional assets making up 94.6% of all institutional MMF totals. According to Crane Data's separate Money Fund Intelligence Daily series, money fund assets have increased by $37.5 billion to $8.379 trillion month-to-date in September (as of 9/9), assets reached an all-time high of $8.404 trillion on July 6. Assets increased $52.8 billion in August, decreased $61.4 billion in July, increased $58.6 billion in June, $208.6 billion in May, decreased by $108.8 billion in April, $49.3 billion in March, increased $99.5 billion in February, $32.9 billion in January, $126.3 billion in December, $132.8 billion in November, $142.1 billion in October and $105.2 billion last September. Note that `ICI's asset totals don't include a number of funds tracked by the SEC and Crane Data, so they're almost $400 billion lower than Crane's asset series.
