Functional and classification aspects of stock indices.

The article defines and clarifies the system of stock indices functions. Based on the analysis of methodological approaches and functionality their multi-criteria classification is developed. The offered classification of stock indices represents all features of constructional and functional setting of indicators and provides a theoretical basis for the improvement of methodology of stock indices, increase in transparency in the market of securities and increase in efficiency of investment mechanism in the market based on the fruitful co-operation of financial and real sectors of economy, especially the industrial sector of Ukraine.