How to Evaluate Hedge Fund Performance: Sharpe Ratio, Alpha and Drawdown

Hedge fund performance is evaluated with risk-adjusted metrics, not raw returns alone. The most widely used are the Sharpe ratio (return per unit of total risk), the Sortino ratio (return per unit of downside risk), alpha and beta (skill versus market exposure), the information ratio (consistency against a benchmark) and maximum drawdown (the worst peak-to-trough loss). Read together, they show not only how much a fund earned, but how it earned it and what an investor had to sit through along the way.

Why Return Alone Is Not Enough

Two funds with the same annual return can be very different investments. One may have reached it with steady monthly results, the other with large swings and a deep loss in between. Performance metrics exist to make that difference visible and comparable.

This matters especially for hedge funds, which often aim for a different return profile than equity markets: lower volatility, lower correlation, or protection in falling markets. Judging them only by whether they beat a stock index misses the point — a question we look at in detail in How Many Hedge Funds Beat the Market. The metrics below answer a different question: how efficiently did the fund turn risk into return?

What Is the Sharpe Ratio?

The Sharpe ratio measures how much excess return a fund delivers for each unit of total risk. It is calculated as the fund's return minus the risk-free rate, divided by the standard deviation of those excess returns. The measure was introduced by Nobel laureate William F. Sharpe, who later described it in The Sharpe Ratio (Journal of Portfolio Management, 1994) as the expected return per unit of risk.

Formula: Sharpe ratio = (fund return − risk-free rate) ÷ standard deviation of excess return.

A higher Sharpe ratio means more return for the volatility taken. As an illustration only: a fund returning 7% with a 2% risk-free rate and 5% volatility has a Sharpe ratio of 1.0; a fund returning 10% with 12% volatility has a Sharpe ratio of about 0.67 — a higher return, but less efficiently earned. Practitioners often treat values above 1 as solid, but there is no universal threshold; the ratio is most useful when comparing funds over the same period and with the same calculation method.

Limits of the Sharpe ratio

The Sharpe ratio treats upside and downside volatility the same and assumes that standard deviation captures risk well. Many hedge fund strategies produce asymmetric returns with occasional large losses, which standard deviation can understate. That is why it should be read alongside measures of the shape of returns, explained in our article on skewness and kurtosis in hedge fund returns.

Sortino Ratio: Focusing on Downside Risk

The Sortino ratio works like the Sharpe ratio but only counts harmful volatility. Instead of total standard deviation, it divides excess return by downside deviation — the variability of returns below a target, often zero or the risk-free rate.

For investors, this is closer to how risk is actually felt: upside surprises are welcome, losses are not. A fund whose volatility comes mainly from strong positive months will look better on the Sortino ratio than on the Sharpe ratio. Comparing the two quickly shows whether a fund's volatility is mostly "good" or "bad".

Alpha and Beta: Skill vs. Market Exposure

Beta measures how sensitive a fund is to a market benchmark; alpha is the return that remains after accounting for that market exposure. A beta of 1 means the fund tends to move with the market; a beta of 0.3 means it captures roughly a third of market moves. Alpha is the part of performance that market exposure does not explain.

The classic version is Jensen's alpha: the difference between a portfolio's actual return and the return the Capital Asset Pricing Model would require for its level of systematic risk. The CFA Institute paper Measures of Risk-Adjusted Return describes it alongside the related Treynor ratio, which divides excess return by beta instead of total volatility.

Why hedge fund alpha matters

Hedge fund alpha is the reason many investors pay for active management. A fund that earns equity-like returns with a beta close to 1 is mostly delivering market exposure that could be bought cheaply elsewhere. A fund with a low beta and persistent positive alpha is adding something different. Strategies such as long/short equity and market neutral are designed to reduce beta, so alpha becomes the main source of return. The same logic applies to absolute return strategies, which aim for positive results regardless of market direction.

Alpha vs. beta: the difference in one sentence

Beta is return you get for being in the market; alpha is return you get for being in the market differently — and only alpha can be credited to the manager's skill, provided the benchmark is chosen correctly.

Information Ratio: Consistency Against a Benchmark

The information ratio measures how consistently a fund beats its benchmark. It divides active return (fund return minus benchmark return) by tracking error, the standard deviation of that active return.

A fund that beats its benchmark by a small margin every year can have a higher information ratio than one that beats it by a lot in some years and lags badly in others. For investors, it is a useful test of whether outperformance is repeatable or the product of a few lucky periods.

What Is Maximum Drawdown?

Maximum drawdown is the largest percentage fall from a fund's previous peak to its subsequent low before a new peak is reached. It answers a very practical question: what was the worst loss an investor would have experienced if they had bought at the top?

Drawdown matters because losses compound asymmetrically. As an illustration, a 20% loss requires a 25% gain to recover, and a 50% loss requires a 100% gain. Two related measures are often reported with it: the recovery period (how long it took to regain the previous peak) and the Calmar ratio, which divides annualised return by maximum drawdown.

Because drawdown depends on the path of returns, it is especially informative for strategies built to hold up in difficult markets, such as managed futures and global macro.

Sharpe vs. Sortino vs. Information Ratio: Which to Use?

No single metric is sufficient. A high Sharpe ratio with a deep historical drawdown, or strong alpha measured against the wrong benchmark, can both mislead.

How Investors Combine the Metrics

Professional investors rarely rely on one number. A typical review looks at several metrics over the same period, net of fees, and across different market environments. Five practical rules help:

• Use a long enough track record. Ratios based on two or three years of monthly data can change considerably when a single difficult period is added.
• Compare like with like. Use the same period, frequency and risk-free rate, and compare funds within the same strategy.
• Check the benchmark. Alpha and the information ratio are only as meaningful as the benchmark behind them.
• Look at net returns. Fees reduce every metric; a fund's gross Sharpe ratio is not what investors receive.
• Combine numbers with qualitative due diligence. Strategy, team, risk management and operations explain whether past figures are likely to persist — the subject of our guide to hedge fund manager selection.

In a multi-manager portfolio the same metrics are applied twice: to each underlying fund and to the portfolio as a whole, where low correlation between managers can improve the overall risk-adjusted profile. The Altalpha SICAV – Abacorum Fund, a multi-strategy fund of hedge funds managed by AQUIS Capital, combines Long/Short Equity, Long/Short Credit, Global Macro and Event Driven strategies with this kind of portfolio-level view.

Common Pitfalls When Reading Performance Metrics

• Smoothed returns. Funds holding less liquid assets may report returns that look less volatile than the underlying risk, inflating the Sharpe ratio.
• Non-normal returns. Strategies with rare but large losses can show attractive ratios until the loss occurs.
• Short or selective periods. A period that excludes a market crisis can make almost any fund look efficient.
• Survivorship and backfill bias. Industry averages include only funds that kept reporting, which tends to flatter historical figures.

Frequently Asked Questions

What is a good Sharpe ratio for a hedge fund?

There is no universal threshold. Values above 1 are often considered solid, but the figure depends on the period, the risk-free rate used and the strategy. It is most useful for comparing similar funds measured the same way.

What is the difference between the Sharpe ratio and the Sortino ratio?

The Sharpe ratio divides excess return by total volatility, while the Sortino ratio divides it by downside volatility only. The Sortino ratio therefore does not penalise a fund for strong positive months.

What is alpha in a hedge fund?

Alpha is the part of a hedge fund's return that cannot be explained by its exposure to the market. It is commonly used as a measure of the value added by the manager, provided the benchmark is appropriate.

What does maximum drawdown tell an investor?

Maximum drawdown shows the largest loss from a peak to a subsequent low. It indicates the worst experience an investor would have had and, together with the recovery period, how long that loss lasted.

Can a fund have high returns but a low Sharpe ratio?

Yes. If high returns come with very high volatility, the return per unit of risk can be lower than that of a fund with modest but steady returns.

Read more about AQUIS Capital and the team behind it, explore the AQUIS Capital fund range, or contact the team with your questions.

This content is for general information only and is not financial, investment, tax or legal advice. Investments carry risk, including the possible loss of capital. Consult a licensed professional before making decisions.