Assets Under Management is the total market value of the investments a firm manages on behalf of clients — the headline number used to size, rank, and compare asset managers, wealth managers, and hedge funds.
Why It Matters
AUM is the base most investment-management revenue is built on: management fees are typically charged as a percentage of AUM, so growth (or decline) in AUM flows almost directly to revenue. It's also the metric regulators, allocators, and the press use as the primary yardstick for a firm's scale and market position.
How It Works in Practice
- 1AUM includes the market value of all client assets under discretionary or advisory management, marked to current prices
- 2It grows through net new inflows (new client assets) and market appreciation, and shrinks through outflows and market declines
- 3Firms report AUM by strategy, product, or client segment to show where growth (or attrition) is concentrated
- 4Fee revenue = AUM × the fee rate, which is why even flat AUM in a rising market translates into higher revenue for asset-based fee structures
Common Pitfalls
AUM growth driven by market appreciation looks identical in a headline number to growth driven by genuine new client wins — separating the two (net flows vs. market performance) is essential to judging real business momentum
Some firms count committed-but-undrawn capital (common in private funds) as AUM, which can overstate assets actually generating fee revenue depending on the fee basis
AUM concentration in a small number of large clients or strategies creates real business risk that the headline number alone doesn't reveal
Related Terms
Where this comes up
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