Investors poured $3.18 billion into money market funds in the week ended Aug. 28, boosting total assets to a record $2.723 trillion, beating the previous week’s record, Dow Jones reports.

The flows were completely driven by institutional investors, who contributed $4.20 billion, whereas retail investors pulled a net $1.02 billion.

Yields for all types of taxable money market funds, meanwhile, declined slightly, with the average seven-day simple yield slipping to 4.52% from 4.54%. The average seven-day compound yield, which includes reinvestments stood at 4.62%, down from 4.65%. Thirty-day simple yields fell to 4.65% from 4.70%, and 30-day compound yields went to 4.76% from 4.81%.

Non-taxable funds, on the other hand, saw slight upticks in their yields. The average seven-day simple yield for non-taxable funds inched up to 3.28% from 3.11%, and the average seven-day compound yield went to 3.33% from 3.16%. The 30-day simple yield rose to 3.10% from 3.06% and the 30-day compound yield increased to 3.15% from 3.10%.

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