The paper aims at reminding the classic risk measures and presenting the RiskGrade measure (1994). This statistic allows comparisons between the investment risk of different financial assets and also the risk of financial investments across different regions of the World. Some advantages and disadvantages of this measure of volatility and also technical problems of using will be described. After describing RiskGrade measure, the rating of Open Pension Funds (OPFs) considering the investment risk will be created. Obtained results will be compared with the risk of selected Open Investment Funds (OIFs) - with similar assets structure - operating on the Polish asset’s market. Next part of the paper contains the suggestion of the measure...