The paper introduces and confirms the following hypothesis: the system of the investment fund market indicators can be considered as an indicator of the country's socio-economic development. In order to confirm the suggested hypothesis the paper has investigated the advantages and disadvantages of investment funds, promoting and hindering expansions of investment funds in the collective investment market, and has developed their classification according to a number of attributes. A system of indicative ratios of socio-economic development has been proposed in relation to the investment fund market: number of open-end mutual funds; net asset value of open-end mutual funds; capital inflow (outflow) into open-end mutual funds. The analysis of the Russian open-end mutual fund market has been performed. Based on this analysis, conclusions about the state of the economic and social development in Russia have been made.