Assets invested in money market mutual funds climbed 1.0%, to $952.54 billion, in the week that ended May 7, the Investment Company Institute reported.

The inflows, while broad-based, were strongest in portfolios for institutional investors. These funds closed the week with $315.85 billion of assets, up 2.3%. That includes $282.95 billion in taxable portfolios, up 1.7%, and $32.90 billion in tax-exempt portfolios, up 7.1%.

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