Our goal is to study a broad sample of countries. We gather reliable data for 55 nations and measure the size of each country’s mutual fund industry relative to the country’s assets in “primary” domestic securities (which includes equities, bonds, and bank loans) that are available to prospective investors. For completeness, we also report the size of national fund industry assets relative to the country’s GDP and population. We study the industry as a whole, and equity and bond funds separately, because certain hypotheses apply only to one of the two subsectors. .