After garnering over $1 billion that ended a nearly month-long, outflow pattern last week, tax-exempt money market funds were back in negative territory this week as they lost $449.9 million and total net assets settled at $269.80 billion for the week ended Sept. 17, according to The Money Fund Report, a service of

The arrival of $1.94 billion last week -- which caused total net assets increase to $270.25 billion, was the first inflow activity since a modest $124.8 million saw total net asset rise to $272.46 billion in the week ended Aug. 20.

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