This paper examines the respective impacts of public and private governance institutions on foreign direct and foreign portfolio investment inflows. We present two hypotheses: (1) there is a strong correlation between the quality of a country’s public governance institutions and the amount of foreign direct investment (FDI) received while the quality of its private governance institutions has no further discernible impact on this correlation; (2) there is a strong correlation between the quality of a country’s public governance institutions and the amount of foreign portfolio investment (FPI) received while the quality of its private governance institutions has a further positive impact on this correlation. Our findings, which are based on panel data analysis, show both hypotheses to be valid.