The Investment Company Institute's latest weekly "Money Market Fund Assets" report shows money fund assets falling by $11.0 billion to $7.626 trillion. MMFs fell $5.6 billion the previous week, and they fell by a massive $175.8 billion two weeks prior, the largest weekly drop ever. (The second largest drop ever was also tax related, $125.4 billion during the week ended April 16, 2025; the third largest was $121.3 billion the week of Sept. 17, 2008; and the fourth largest was $112.0 billion the week ended April 17, 2024.) Assets hit a record high $7.856 trillion six weeks ago. MMFs have risen in 23 of the last 32 weeks and 31 of the past 41 weeks. MMF assets are up by $718 billion, or 10.4%, over the past 52 weeks (through 4/29/26), with Institutional MMFs up $503 billion, or 12.4% and Retail MMFs up $215 billion, or 7.5%. Year-to-date in 2026, MMF assets are down by $107 billion, or -1.4%, with Institutional MMFs down $94 billion, or -2.0% and Retail MMFs down $12 billion, or -0.4%. ICI's weekly release says, "Total money market fund assets decreased by $10.98 billion to $7.63 trillion for the week ended Wednesday, April 29, the Investment Company Institute reported.... Among taxable money market funds, government funds decreased by $8.02 billion and prime funds decreased by $5.23 billion. Tax-exempt money market funds increased by $2.26 billion." ICI's stats show Institutional MMFs decreasing $6.6 billion and Retail MMFs decreasing $4.4 billion in the latest week. Total Government MMF assets, including Treasury funds, were $6.261 trillion (82.1% of all money funds), while Total Prime MMFs were $1.221 trillion (16.0%). Tax Exempt MMFs totaled $144.7 billion (1.9%). It explains, "Assets of retail money market funds decreased by $4.44 billion to $3.07 trillion. Among retail funds, government money market fund assets decreased by $4.95 billion to $1.95 trillion, prime money market fund assets decreased by $1.59 billion to $984.94 billion, and tax-exempt fund assets increased by $2.10 billion to $132.18 billion." Retail assets account for 40.2% of the total, and Government Retail assets make up 63.6% of all Retail MMFs. They add, "Assets of institutional money market funds decreased by $6.55 billion to $4.56 trillion. Among institutional funds, government money market fund assets decreased by $3.06 billion to $4.31 trillion, prime money market fund assets decreased by $3.64 billion to $235.88 billion, and tax-exempt fund assets increased by $157 million to $12.52 billion." Institutional assets accounted for 59.8% 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 decreased by $129.1 billion to $8.063 trillion month-to-date in April (as of 4/29), assets hit a record high on March 18 of $8.280 trillion. (Our asset series previous record high, $8.276 trillion, was set on 3/17/26.) Assets decreased by $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, $6.7 billion in June and $100.9 billion in May, but fell by $24.4 billion last April. 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.