US money market fund assets have surged to a record $6.67 trillion, reflecting an $81.6 billion increase for the week ending November 13, driven primarily by institutional investors seeking stability amid fluctuating interest rates. Following a significant 50 basis point cut in September and a subsequent 25 basis point reduction in November by the US Federal Reserve, there has been a notable preference for low-risk assets, with $80.3 billion flowing into government-focused funds. In contrast, tax-exempt money market funds saw a decline of $1.99 billion, indicating reduced demand for tax-free investments.