Tax-exempt money market fund assets declined by $7.27 billion for the week ending April 21 - nearly triple the outflows that they lost the prior week ahead of the income tax deadline, according to the Money Fund Report, a service of imoneynet.com.

The 547 tax-exempt funds ended the week with total assets of $494.7 billion, compared with $501.97 billion the previous week when they lost just $2.85 billion, according to the report.

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