Abstract: The subject of this research is the methods of assessing the risk management of an economic entity. Special attention is given to the assessment of investment and financial risks considered most important from the perspective of planning the future financial result. The goal of this work lies in the examination of theoretical foundations, peculiarities and correlations of the category of “risk” with the enterprise performance indicators, which allows to logically substantiate the multistage system of investment and financial risk management, universal to economic entities operating in various sectors. Methodological base is structure on the theory of risk management and corporate finance, which allows viewing the characteristic of the investment and financial risks, specificities of their forecasting and assessment, as well as determining the importance of influence upon the financial result. The authors develop an algorithm of financial and investment risk management of the economic entity, which represents an open system with the object and subject of management, executive branch affecting the object of management for the purpose of changing the end financial result, and six management stages. The authors also propose and logically substantiate the multidimensional vector model of risk assessment, based on the hypothesis for the dependence between the initial value of the asset and the value of risk, and determining the true value of the asset “minus the risk” value based on this formula. The authors believe that further research on this topic would help solve a relevant for the Russian economy problem of the establishment of comprehensive system of assessment and management of risks of economic entities.