Money market mutual fund assets rose 0.6%, to $746.02 billion, in the week ended Oct. 18, the Investment Company Institute reported.

The gain, from $741.9 billion a week earlier, was fueled entirely by inflows to taxable money market funds, particularly those for institutional investors.

Taxable institutional funds closed the week with $200.24 billion, up $4.1 billion. Tax-exempt funds for institutional investors fell $281.5 million, to $24.46 billion.

On the retail side, assets of taxable money funds rose $743.3 million, to $420.14 billion. Tax-exempt funds shed $441.8 million to close the week at $101.17 billion.

The institute, a Washington-based trade group for mutual fund companies, bases its findings on a survey of 982 money market mutual funds.

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