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Volatility is a risk indicator that measures the magnitude of the price changes of a financial asset. The more these changes deviate from their average, the more the volatility increases: the asset is then considered riskier. An increase in volatility means both a chance of higher gains and a risk of losing more. Volatility is calculated for individual stocks as well as for bonds, portfolios, indices, etc.


Beta is a relative risk indicator that measures the sensitivity of a financial asset to another asset, usually a market index. If a fund has a beta of 1 vs. its benchmark, this will result in a behaviour in line with that of the index; a beta greater than 1 means that the fund tends to amplify the movements of the index; a beta between 0 and 1, that the fund attenuates the movements of the index; a beta close to 0 that the fund is uncorrelated to the index; a negative beta, that the fund has a behaviour opposite to the index.

Sharpe Ratio

The Sharpe ratio is a risk-adjusted performance indicator popularized by William F. Sharpe (Nobel Prize in Economics). It measures a fund’s ability to take the full advantage of the risk taken and convert it into performance. It is calculated by relating the annualized performance of the fund to its volatility. The ratio expresses the performance of the fund per unit of risk.

Performance, Return

The performance or return of a fund is most often measured as the percent change in the amount invested.

Annualised Performance, Annualised Return

The annualized performance is the performance expressed in compound annual rate of return. For observation periods beyond 1 year, it is frequent to annualize the return figures, in order to be able to compare returns calculated over different horizons (1 year, 3 years, 5 years). For example, the annualized performance of a fund over 3 years is the (annual) return that the fund should produce 3 years in a row to achieve the 3-year return.


The benchmark of a fund is an index representative of the asset class segment the fund invests in. This reference makes it possible to evaluate the fund in terms of performance and risk. A fund that invests in European equities will be benchmarked by an index representative of the European equity class.

Net Asset Value, NAV

The Net Asset Value refers to the price of a fund unit. It is calculated on the basis of the total assets of the fund divided by the number of units.