Journal article: This article reviews the various aspects of the concept of financial literacy: political, theoretical, methodological and empirical. The debates and issues surrounding economic literacy emerged in the early 2000s. Academic research on household finance then took up the subject by relying on psychological economics. The question of measuring financial literacy then arose: Big Three or otherwise. To answer these questions, we use recent data collected in France (the FLIP survey: Financial LIteracy and Wealth). The behavioural part looks at the stock market puzzle by studying the link between financial literacy and demand for risky assets. The growing recommendation to develop financial education programs in order to overcome weak literacy raises the question of their effectiveness.