Policy makers increasingly rely on theories of social capital to fashion development interventions that mobilize local social networks in the alleviation of poverty. The potential of such theory lies in its recognition of the social dimensions of economic growth. This recognition has inspired some innovative approaches to development, such as the now-popular microfinance model. In assessing the implications of these recent developments for feminist objectives of social transformation, this paper evaluates prevailing ideas about social capital (rooted in rational choice theory) against the grain of three alternative approaches: Marxian social capital theories ( la Pierre Bourdieu), neo-Foucauldian governmentality studies, and my feminist ethnographic research on the social embeddedness of economic practice in a merchant community of Nepal. The paper concludes by bringing these critical insights to bear on possibilities for designing microfinance programs - and practicing a kind of development more generally - that could engage women's solidarity to challenge dominant gender ideologies.