ICI: MMF Assets Up to $7.94 Trillion
The Investment Company Institute's latest weekly "Money Market Fund Assets" report shows money fund assets increasing $15.0 billion to $7.936 trillion. Assets fell $52.0 billion the previous week and decreased $5.9 billion the week before this. Assets saw a record high of $7.979 trillion three weeks prior. MMF assets are up by $622 billion, or 8.5%, over the past 52 weeks (through 9/23/26), with Institutional MMFs up $469 billion, or 10.8% and Retail MMFs up $153 billion, or 5.2%. Year-to-date in 2026, MMF assets are up by $203 billion, or 2.6%, with Institutional MMFs up $168 billion, or 3.6% and Retail MMFs up $35 billion, or 1.1%. ICI's weekly release says, "Total money market fund assets increased by $15.00 billion to $7.94 trillion for the week ended Wednesday, September 23, the Investment Company Institute reported.... Among taxable money market funds, government funds increased by $389 million and prime funds increased by $10.95 billion. Tax-exempt money market funds increased by $3.66 billion." ICI's stats show Institutional MMFs increasing $15.3 billion and Retail MMFs decreasing $0.3 billion in the latest week. Total Government MMF assets, including Treasury funds, were $6.531 trillion (82.3% of all money funds), while Total Prime MMFs were $1.251 trillion (15.8%). Tax Exempt MMFs totaled $154.1 billion (1.9%). It explains, "Assets of retail money market funds decreased by $256 million to $3.11 trillion. Among retail funds, government money market fund assets decreased by $774 million to $1.98 trillion, prime money market fund assets decreased by $1.96 billion to $989.43 billion, and tax-exempt fund assets increased by $2.48 billion to $139.70 billion." Retail assets account for 39.2% of the total, and Government Retail assets make up 63.7% of all Retail MMFs. They add, "Assets of institutional money market funds increased by $15.26 billion to $4.82 trillion. Among institutional funds, government money market fund assets increased by $1.16 billion to $4.55 trillion, prime money market fund assets increased by $12.91 billion to $261.99 billion, and tax-exempt fund assets increased by $1.18 billion to $14.38 billion." Institutional assets accounted for 60.8% of all MMF assets, with Government Institutional assets making up 94.3% of all institutional MMF totals. According to Crane Data's separate Money Fund Intelligence Daily series, money fund assets have increased by $1.3 billion to $8.343 trillion month-to-date in September (as of 9/23), 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.
