Assets of money market mutual funds rose 0.11%, to $1.030 trillion, in the week that ended Sept. 3, the Investment Company Institute reported.

The increase was concentrated in funds for institutional investors, which closed the week with $350.05 billion of assets, up 0.71%. That includes $313.43 billion in taxable portfolios, up $1.79 billion, and $36.62 billion in tax-exempt portfolios, up $682 million.

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