ICI's weekly Money Market Mutual Fund survey shows assets increasing a mere $461 million to $3.906 trillion for the week ended March 11. Institutional funds declined by $10.7 billion to $2.541 trillion while Retail funds increased by $10.7 billion to $1.365 trillion. Government Institutional funds (including Treasuries) led the decline, falling $9.7 billion to $1.166 trillion. Prime Institutional funds fell by $2.4 billion to $1.183 trillion, but Tax-Exempt Inst funds rose by $1.8 billion to $192 billion. Government retail funds rose $1.8 billion to $251 billion, Prime retail funds rose $9.2 billion to $824 billion, and Tax-exempt retail assets fell by $0.4 billion to $290 billion.