The Investment Company Institute reported its latest money market mutual fund asset totals last night, showing a decline of $6.91 billion to $3.498 trillion in the week ended July 16. Institutional assets decreased by $16.89 billion to $2.270 trillion, likely impacted by the July 15 quarterly corporate tax date. Retail money fund assets increased by $9.98 billion to $1.228 trillion. Institutional funds saw declines in every category, though government funds fared surprisingly well considering (unfounded) concerns over Fannie Mae and Freddie Mac. Govt Inst funds decreased just $1.49 billion.