ICI's latest "Money Market Fund Assets" report shows money market mutual fund assets falling sharply ahead of the April 15 tax payment date to $6.080 trillion in the latest week after a jump the prior week. MMF assets are still up by $194 billion, or 4.1%, year-to-date in 2024 (through 4/10/24), with Institutional MMFs up $68 billion, or 2.2% and Retail MMFs up $126 billion, or 7.5%. Over the past 52 weeks, money funds have risen by $803 billion, or 15.2%, with Retail MMFs rising by $513 billion (26.9%) and Inst MMFs rising by $290 billion (8.6%). The weekly release says, "Total money market fund assets decreased by $30.98 billion to $6.08 trillion for the week ended Wednesday, April 10, the Investment Company Institute reported.... Among taxable money market funds, government funds decreased by $28.03 billion and prime funds decreased by $3.19 billion. Tax-exempt money market funds increased by $249 million." ICI's stats show Institutional MMFs falling $17.9 billion and Retail MMFs dropping $13.1 billion in the latest week. Total Government MMF assets, including Treasury funds, were $4.930 trillion (81.1% of all money funds), while Total Prime MMFs were $1.026 trillion (16.9%). Tax Exempt MMFs totaled $124.3 billion (2.0%). ICI explains, "Assets of retail money market funds decreased by $13.07 billion to $2.42 trillion. Among retail funds, government money market fund assets decreased by $10.30 billion to $1.55 trillion, prime money market fund assets decreased by $3.07 billion to $751.42 billion, and tax-exempt fund assets increased by $291 million to $112.69 billion." Retail assets account for over a third of total assets, or 39.7%, and Government Retail assets make up 64.2% of all Retail MMFs. They add, "Assets of institutional money market funds decreased by $17.91 billion to $3.66 trillion. Among institutional funds, government money market fund assets decreased by $17.74 billion to $3.38 trillion, prime money market fund assets decreased by $125 million to $274.27 billion, and tax-exempt fund assets decreased by $42 million to $11.57 billion." Institutional assets accounted for 60.3% of all MMF assets, with Government Institutional assets making up 92.2% of all institutional MMF totals. According to Crane Data's separate Money Fund Intelligence Daily series, money fund assets have risen by $100.6 billion in April (through 4/10) to $6.498 trillion (they were a record $6.538 trillion on 4/2). Assets fell $68.8 billion in March, but 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. They rose $93.9 billion in September, $98.3 billion in August and $34.7 billion in July. 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.