Article aims to demonstrate the significant impact of dynamics of the relationship between financial intermediaries on the level of market volatility. Particularly important are the growing share of the links between hedge funds and other financial institutions. In order to demonstrate the dynamic test was presented Granger causality, which allows the statistical analysis of cause and effect relationships in the risk spread in the financial system. Using multiple regression analysis study was calculated the impact of the hedge fund market development (measured in assets, leverage, the price volatility in various financial markets). Due to data availability study has been limited to 10-year period of analysis (2001-2011). The results show a significant correlation between the volatility in the stock market, bonds and CDS, and the activities of hedge funds on financial markets.