The Investment Company Institute's latest weekly "Money Market Fund Assets" report shows money fund assets falling $18.9 billion to $7.900 trillion, after jumping $39.7 billion to a record $7.919 trillion the previous week. MMF assets are up by $877 billion, or 12.5%, over the past 52 weeks (through 6/24/26), with Institutional MMFs up $690 billion, or 16.7% and Retail MMFs up $187 billion, or 6.5%. Year-to-date in 2026, MMF assets are up by $167 billion, or 2.2%, with Institutional MMFs up $161 billion, or 3.4% and Retail MMFs up $6 billion, or 0.2%. ICI's weekly release says, "Total money market fund assets decreased by $18.91 billion to $7.90 trillion for the week ended Wednesday, June 24, the Investment Company Institute reported.... Among taxable money market funds, government funds decreased by $18.15 billion and prime funds decreased by $1.06 billion. Tax-exempt money market funds increased by $297 million." ICI's stats show Institutional MMFs decreasing $17.0 billion and Retail MMFs decreasing $1.9 billion in the latest week. Total Government MMF assets, including Treasury funds, were $6.522 trillion (82.6% of all money funds), while Total Prime MMFs were $1.230 trillion (15.6%). Tax Exempt MMFs totaled $148.6 billion (1.9%). It explains, "Assets of retail money market funds decreased by $1.90 billion to $3.08 trillion. Among retail funds, government money market fund assets decreased by $1.81 billion to $1.96 trillion, prime money market fund assets decreased by $1.42 billion to $985.10 billion, and tax-exempt fund assets increased by $1.33 billion to $135.65 billion." Retail assets account for 39.0% 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 $17.01 billion to $4.82 trillion. Among institutional funds, government money market fund assets decreased by $16.35 billion to $4.56 trillion, prime money market fund assets increased by $366 million to $244.74 billion, and tax-exempt fund assets decreased by $1.03 billion to $12.98 billion." Institutional assets accounted for 61.0% 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 $44.4 billion to $8.336 trillion month-to-date in June (as of 6/24). Assets hit a record high on June 16 of $8.370 trillion. Assets increased $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, $105.2 billion in September and $132.0 billion in August. They rose $63.7 billion in July and $6.7 billion last June. 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.