THE ACCOUNT OF RISKS AND UNCERTAINTY AT FORMATION OF THE INVESTMENT PORTFOLIO OF BUSINESSMAN.
Decisions of the entrepreneur for the most part accompanied by the risks associated not only with a business per se, but with the changing conditions of realization of investment projects-vestment. To effectively manage risk them in the first place, it is necessary to measure the. Using the methods of risk estimation can be justified investment decisions that are acceptable and the best according to some criteria for the prevailing conditions.
 Most of the entrepreneurs, their firms, companies succeed and become competitive on the basis of innovation capable of economic activity related to risk. Risk of the solution, risk type of economy lead to more efficient production, of which wins, undermining both entrepreneurs and consumers, and society as a whole. Thus, business risk carries innovative feature.
 Comparative analysis of traditional methods of evaluating the effectiveness of long-term investment, the existing methods of forming the optimal portfolio of the investment project and the fuzzy-interval method shows that the theory of fuzzy sets is one of the most efficient mathematical theories aimed at formalizing and processing of uncertain information and largely integrating known approaches and methods. The theory of fuzzy sets confirms the known fact that the formal apparatus used in its potential and accuracy should be adequate to describe the problem and match the precision of the initial experimental data. Therefore, effective methods of mathematical analysis used in the deterministic GOVERNMENTAL the original data. Mathematical statistics and probability theory using experimental data with a certain accuracy and reliability. The theory of fuzzy sets makes it possible to handle the diverse degree of uncertainty for information specific to real-world investment analysis.