Invesco Ltd.'s assets under management fell 1.8% in August, to $449.8 billion, according to its preliminary month-end results.

The Atlanta investment manager, which issued the results Tuesday, said its assets under management have fallen 8.5% since the end of May. After removing money market fund assets, which have remained relatively flat since the end of May, assets under management in long-term investment products have fallen 10.7%, to $356.6 billion, in the last three months.

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