The Investment Company Institute published its latest weekly "Money Market Fund Assets" report Thursday. ICI shows money market mutual fund assets jumping for the sixth week in a row (up $23.4 billion) to a record $6.324 trillion. Assets have risen in 17 of the last 21 weeks, increasing by $346.1 billion (or 5.8%) since April 24. MMF assets are up by $437 billion, or 9.2%, year-to-date in 2024 (through 9/11/24), with Institutional MMFs up $167 billion, or 5.5% and Retail MMFs up $270 billion, or 16.1%. Over the past 52 weeks, money funds have risen by $681 billion, or 12.1%, with Retail MMFs up by $444 billion (21.0%) and Inst MMFs rising by $237 billion (6.7%). ICI's weekly release says, "Total money market fund assets increased by $23.37 billion to $6.32 trillion for the week ended Wednesday, September 11.... Among taxable money market funds, government funds increased by $31.75 billion and prime funds decreased by $6.00 billion. Tax-exempt money market funds decreased by $2.39 billion." ICI's stats show Institutional MMFs rising $17.2 billion and Retail MMFs rising $6.2 billion in the latest week. Total Government MMF assets, including Treasury funds, were $5.148 trillion (81.4% of all money funds), while Total Prime MMFs were $1.048 trillion (16.6%). Tax Exempt MMFs totaled $127.3 billion (2.0%). ICI explains, "Assets of retail money market funds increased by $6.21 billion to $2.56 trillion. Among retail funds, government money market fund assets increased by $4.43 billion to $1.62 trillion, prime money market fund assets increased by $3.33 billion to $818.84 billion, and tax-exempt fund assets decreased by $1.55 billion to $116.82 billion." Retail assets account for over a third of total assets, or 40.5%, and Government Retail assets make up 63.5% of all Retail MMFs. They add, "Assets of institutional money market funds increased by $17.15 billion to $3.76 trillion. Among institutional funds, government money market fund assets increased by $27.32 billion to $3.52 trillion, prime money market fund assets decreased by $9.33 billion to $229.60 billion, and tax-exempt fund assets decreased by $841 million to $10.46 billion." Institutional assets accounted for 59.5% of all MMF assets, with Government Institutional assets making up 93.6% of all institutional MMF totals. According to Crane Data's separate Money Fund Intelligence Daily series, money fund assets have risen by $42.1 billion in September (through 9/11) to $6.657 trillion. They hit a record $6.682 trillion on 9/5 but have fallen slightly since. Assets rose by $109.7 billion in August, $16.6 billion in July, $15.7 billion in June and $91.4 billion in May, but they fell $15.8 billion in April and $68.8 billion in March. They rose $72.1 billion in February, $93.9 billion in January, $32.7 billion in December and $226.4 billion in November. MMF totals fell by $31.9 billion in October and they rose $93.9 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 over $400 billion lower than Crane's asset series.