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What is a hedge fund and how does it work?

By the FES team · Published 17 May 2026

In brief: A hedge fund is a private investment pool for wealthy and institutional investors that can use complex strategies — including short selling, leverage, and derivatives — to generate returns regardless of whether markets rise or fall. The name comes from "hedging" risk, though many modern hedge funds take significant directional bets.

Hedge funds sit at the apex of the investment management world. They manage trillions of dollars, employ some of the highest-paid people in finance, and operate with far fewer restrictions than mutual funds or ETFs. But their average performance has disappointed over the past decade, raising serious questions about their value for investors.

What makes hedge funds different

Hedge Fund Index Fund
Who can invest Qualified investors only (typically £/$ 1m+ net worth) Anyone
Fees "2 and 20" — 2% annual + 20% of profits 0.03–0.2% per year
Strategies Shorts, leverage, derivatives, anything Hold the index
Transparency Low — minimal disclosure High — holdings published

The major hedge fund strategies

Long/short equity: Buy shares expected to rise; short shares expected to fall. The "hedge" is that the short positions offset some market risk. This is the most common strategy.
Global macro: Make large bets on currencies, interest rates, and economies. George Soros's famous £1bn profit shorting the pound in 1992 is the most celebrated example.
Arbitrage: Exploit tiny price differences between related instruments — merger arbitrage (buying takeover targets), statistical arbitrage (quantitative models).
Distressed securities: Buy debt or equity of companies in financial trouble, betting on a recovery or restructuring windfall.

$4.5TAssets managed by hedge funds globally — but the average fund has underperformed a simple S&P 500 tracker over the past decade

The fee problem

The "2 and 20" fee structure — 2% annual management fee plus 20% of any profits — sounds reasonable until you do the maths. If a hedge fund returns 10% in a year, you keep 6.6% after fees. A Vanguard S&P 500 tracker returning the same 10% leaves you with 9.97%. Over 20 years, this difference is enormous. Many hedge funds have moved to "1.5 and 15" or even lower as institutional investors push back.

What this means for you

For most investors, hedge funds are inaccessible and — based on recent evidence — not worth accessing even if you could. The ones that have genuinely outperformed over decades (Bridgewater, Renaissance Technologies) are either closed to new investors or charge fees that consume most of the alpha. Index funds beat the majority of hedge funds after fees. The lesson isn't that active management is impossible — it's that the fees make success almost impossible to achieve for most managers.

The best-performing fund in history, Renaissance Technologies' Medallion Fund, returned 66% annually before fees. After fees — which were 5% and 44% — outside investors got almost nothing. The managers kept it all.
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