Washington – September 08, 2026 -- Total money market fund assets rose by $44.75 billion to $7.98 trillion for the week ended September 2, according to the Investment Company Institute.
Government funds drive the bulk of the weekly inflow
Among taxable money market funds, government funds increased by $38.80 billion, while prime funds added $4.92 billion. Tax-exempt money market funds gained $1.03 billion over the same period.
Retail assets grow to $3.11 trillion on broad-based gains
Retail money market fund assets increased by $11.10 billion to $3.11 trillion. Within this segment, government fund assets rose $7.76 billion to $1.98 trillion, prime fund assets climbed $2.78 billion to $993.16 billion, and tax-exempt fund assets added $565 million to reach $137.92 billion.
Institutional funds account for the majority of new cash
Institutional money market fund assets increased by $33.66 billion to $4.87 trillion, representing the largest share of the week's total growth. Government fund assets in this category rose $31.04 billion to $4.60 trillion, prime fund assets increased $2.15 billion to $249.01 billion, and tax-exempt fund assets gained $469 million to reach $13.00 billion.
ICI reports money market fund asset data to the Federal Reserve on a weekly basis, with figures subject to revision from data adjustments and reclassifications.