Considered and investigated the possibility of determining the market share of the insurer’s on the basis data on its insurance reserves and revenues in the absence of information on insurance payments, specified the term and the formula for calculating the coefficient of the market situation, specified the normative value of the coefficient of the market position, compliance with which is possible to classify the market position of the company responsible investment grade.

Keywords: coefficient of market position, market share, investment grade, non-transparent information and closed markets.