Tax-exempt money market funds rang in 2010 with $2.60 billion of inflows and total assets of $402.24 billion for the week ending Jan. 4, according to the Money Fund Report, a service of iMoneyNet.com.

The average seven-day simple yield for the 500 tax-exempt funds in the report dipped just one basis point, ending at 0.04%, while the average maturity decreased by one day to 30 days compared with the prior week.

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