The paper proposes a panel model to the determinants of capital flow volatility to a group of 18 emerging market economies (EME) in the period of 2000 to 2011. It studies the robustness of the model regarding different volatility measures; analyses several types of gross capital inflow; focusing the role of government institutional quality and the development of domestic financial system (banks, insurance companies, and capital markets – stocks, bonds and derivatives). The EME analyzed represented roughly 95% of the Emerging Markets Bond Index Global – EMBIG in January 2013, being the biggest destination to international capital flow to EME according to the report of the Bank for International Settlements - BIS (2009). The main conclusion suggests that a reduction of capital flow volatility can be achieved by the adoption of policies that improve government institutional quality and promote development, stability and efficiency of the domestic financial system.