Brusov P.N.Doctor of Physical and Mathematical Sciences, Professor of department "Applied Mathematics", the Financial University under the Government of the Russian Federation pnb1983@yahoo.com
Filatova T.V.PhD in Economic Sciences, Professor of department "Financial Management", the Financial University under the Government of the Russian Federation mfilatova@fa.ru
Orekhova N.P.PhD of Physical and Mathematical Sciences, Head of department "Financial and Economical Technology", the Institute of Business, Management and Law, Rostov n/D Natali_Orehova@Bk.Ru
Brusov P.P.PhD of Physical and Mathematical Sciences, Leading Scientist, the Southern Federal University ppb@bmail.ru
Dolgov D.M.Student of department "Financial Management", the Financial University under the Government of the Russian Federation infoddisney@gmail.com
The models of an assessment of dependence of efficiency of investments developed by authors from extra financing are applied to the analysis of efficiency of investments of one of the telecommunication companies for 2010-2012 from the point of view of an optimality of structure of investments. The analysis showed that only in 2011 the structure of investments of the company was close to the optimum.
Keywords: investments, extra financing, efficiency, optimization, cost, capital structure, leverage, Modigliani-Miller theory, Brusov - Filatova - Orekhova theory